climate change essay for class 5

Climate Change Essay for Students and Children

500+ words climate change essay.

Climate change refers to the change in the environmental conditions of the earth. This happens due to many internal and external factors. The climatic change has become a global concern over the last few decades. Besides, these climatic changes affect life on the earth in various ways. These climatic changes are having various impacts on the ecosystem and ecology. Due to these changes, a number of species of plants and animals have gone extinct.

When Did it Start?

The climate started changing a long time ago due to human activities but we came to know about it in the last century. During the last century, we started noticing the climatic change and its effect on human life. We started researching on climate change and came to know that the earth temperature is rising due to a phenomenon called the greenhouse effect. The warming up of earth surface causes many ozone depletion, affect our agriculture , water supply, transportation, and several other problems.

Reason Of Climate Change

Although there are hundreds of reason for the climatic change we are only going to discuss the natural and manmade (human) reasons.

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Natural Reasons

These include volcanic eruption , solar radiation, tectonic plate movement, orbital variations. Due to these activities, the geographical condition of an area become quite harmful for life to survive. Also, these activities raise the temperature of the earth to a great extent causing an imbalance in nature.

Human Reasons

Man due to his need and greed has done many activities that not only harm the environment but himself too. Many plant and animal species go extinct due to human activity. Human activities that harm the climate include deforestation, using fossil fuel , industrial waste , a different type of pollution and many more. All these things damage the climate and ecosystem very badly. And many species of animals and birds got extinct or on a verge of extinction due to hunting.

Effects Of Climatic Change

These climatic changes have a negative impact on the environment. The ocean level is rising, glaciers are melting, CO2 in the air is increasing, forest and wildlife are declining, and water life is also getting disturbed due to climatic changes. Apart from that, it is calculated that if this change keeps on going then many species of plants and animals will get extinct. And there will be a heavy loss to the environment.

What will be Future?

If we do not do anything and things continue to go on like right now then a day in future will come when humans will become extinct from the surface of the earth. But instead of neglecting these problems we start acting on then we can save the earth and our future.

Although humans mistake has caused great damage to the climate and ecosystem. But, it is not late to start again and try to undo what we have done until now to damage the environment. And if every human start contributing to the environment then we can be sure of our existence in the future.

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Climate Change Essay

500+ words essay on climate change.

Climate change is a major global challenge today, and the world is becoming more vulnerable to this change. Climate change refers to the changes in Earth’s climate condition. It describes the changes in the atmosphere which have taken place over a period ranging from decades to millions of years. A recent report from the United Nations predicted that the average global temperature could increase by 6˚ Celsius at the end of the century. Climate change has an adverse effect on the environment and ecosystem. With the help of this essay, students will get to know the causes and effects of climate change and possible solutions. Also, they will be able to write essays on similar topics and can boost their writing skills.

What Causes Climate Change?

The Earth’s climate has always changed and evolved. Some of these changes have been due to natural causes such as volcanic eruptions, floods, forest fires etc., but quite a few of them are due to human activities. Human activities such as deforestation, burning fossil fuels, farming livestock etc., generate an enormous amount of greenhouse gases. This results in the greenhouse effect and global warming which are the major causes of climate change.

Effects of Climate Change

If the current situation of climate change continues in a similar manner, then it will impact all forms of life on the earth. The earth’s temperature will rise, the monsoon patterns will change, sea levels will rise, and storms, volcanic eruptions and natural disasters will occur frequently. The biological and ecological balance of the earth will get disturbed. The environment will get polluted and humans will not be able to get fresh air to breathe and fresh water to drink. Life on earth will come to an end.

Steps to be Taken to Reduce Climate Change

The Government of India has taken many measures to improve the dire situation of Climate Change. The Ministry of Environment and Forests is the nodal agency for climate change issues in India. It has initiated several climate-friendly measures, particularly in the area of renewable energy. India took several steps and policy initiatives to create awareness about climate change and help capacity building for adaptation measures. It has initiated a “Green India” programme under which various trees are planted to make the forest land more green and fertile.

We need to follow the path of sustainable development to effectively address the concerns of climate change. We need to minimise the use of fossil fuels, which is the major cause of global warming. We must adopt alternative sources of energy, such as hydropower, solar and wind energy to make a progressive transition to clean energy. Mahatma Gandhi said that “Earth provides enough to satisfy every man’s need, but not any man’s greed”. With this view, we must remodel our outlook and achieve the goal of sustainable development. By adopting clean technologies, equitable distribution of resources and addressing the issues of equity and justice, we can make our developmental process more harmonious with nature.

We hope students liked this essay on Climate Change and gathered useful information on this topic so that they can write essays in their own words. To get more study material related to the CBSE, ICSE, State Board and Competitive exams, keep visiting the BYJU’S website.

Frequently Asked Questions on climate change Essay

What are the reasons for climate change.

1. Deforestation 2. Excessive usage of fossil fuels 3. Water, Soil pollution 4. Plastic and other non-biodegradable waste 5. Wildlife and nature extinction

How can we save this climate change situation?

1. Avoid over usage of natural resources 2. Do not use or buy items made from animals 3. Avoid plastic usage and pollution

Are there any natural causes for climate change?

Yes, some of the natural causes for climate change are: 1. Solar variations 2. Volcanic eruption and tsunamis 3. Earth’s orbital changes

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Essay on Climate Change

Climate Change Essay - The globe is growing increasingly sensitive to climate change. It is currently a serious worldwide concern. The term "Climate Change" describes changes to the earth's climate. It explains the atmospheric changes that have occurred across time, spanning from decades to millions of years. Here are some sample essays on climate change.

100 Words Essay on Climate Change

200 words essay on climate change, 500 words essay on climate change.

The climatic conditions on Earth are changing due to climate change. Several internal and external variables, such as solar radiation, variations in the Earth's orbit, volcanic eruptions, plate tectonics, etc., are to blame for this.

There are strategies for climate change reduction. If not implemented, the weather might get worse, there might be water scarcity, there could be lower agricultural output, and it might affect people's ability to make a living. In order to breathe clean air and drink pure water, you must concentrate on limiting human activity. These are the simple measures that may be taken to safeguard the environment and its resources.

The climate of the Earth has changed significantly over time. While some of these changes were brought on by natural events like volcanic eruptions, floods, forest fires, etc., many of the changes were brought on by human activity. The burning of fossil fuels, domesticating livestock, and other human activities produce a significant quantity of greenhouse gases. This results in an increase of greenhouse effect and global warming which are the major causes for climate change.

Reasons of Climate Change

Some of the reasons of climate change are:

Deforestation

Excessive use of fossil fuels

Water and soil pollution

Plastic and other non biodegradable waste

Wildlife and nature extinction

Consequences of Climate Change

All kinds of life on earth will be affected by climate change if it continues to change at the same pace. The earth's temperature will increase, the monsoon patterns will shift, the sea level will rise, and there will be more frequent storms, volcano eruptions, and other natural calamities. The earth's biological and ecological equilibrium will be disturbed. Humans won't be able to access clean water or air to breathe when the environment becomes contaminated. The end of life on this earth is imminent. To reduce the issue of climate change, we need to bring social awareness along with strict measures to protect and preserve the natural environment.

A shift in the world's climatic pattern is referred to as climate change. Over the centuries, the climate pattern of our planet has undergone modifications. The amount of carbon dioxide in the atmosphere has significantly grown.

When Did Climate Change Begin

It is possible to see signs of climate change as early as the beginning of the industrial revolution. The pace at which the manufacturers produced things on a large scale required a significant amount of raw materials. Since the raw materials being transformed into finished products now have such huge potential for profit, these business models have spread quickly over the world. Hazardous substances and chemicals build up in the environment as a result of company emissions and waste disposal.

Although climate change is a natural occurrence, it is evident that human activity is turning into the primary cause of the current climate change situation. The major cause is the growing population. Natural resources are utilised more and more as a result of the population's fast growth placing a heavy burden on the available resources. Over time, as more and more products and services are created, pollution will eventually increase.

Causes of Climate Change

There are a number of factors that have contributed towards weather change in the past and continue to do so. Let us look at a few:

Solar Radiation |The climate of earth is determined by how quickly the sun's energy is absorbed and distributed throughout space. This energy is transmitted throughout the world by the winds, ocean currents etc which affects the climatic conditions of the world. Changes in solar intensity have an effect on the world's climate.

Deforestation | The atmosphere's carbon dioxide is stored by trees. As a result of their destruction, carbon dioxide builds up more quickly since there are no trees to absorb it. Additionally, trees release the carbon they stored when we burn them.

Agriculture | Many kinds of greenhouse gases are released into the atmosphere by growing crops and raising livestock. Animals, for instance, create methane, a greenhouse gas that is 30 times more potent than carbon dioxide. The nitrous oxide used in fertilisers is roughly 300 times more strong than carbon dioxide.

How to Prevent Climate Change

We need to look out for drastic steps to stop climate change since it is affecting the resources and life on our planet. We can stop climate change if the right solutions are put in place. Here are some strategies for reducing climate change:

Raising public awareness of climate change

Prohibiting tree-cutting and deforestation.

Ensure the surroundings are clean.

Refrain from using chemical fertilisers.

Water and other natural resource waste should be reduced.

Protect the animals and plants.

Purchase energy-efficient goods and equipment.

Increase the number of trees in the neighbourhood and its surroundings.

Follow the law and safeguard the environment's resources.

Reduce the amount of energy you use.

During the last few decades especially, climate change has grown to be of concern. Global concern has been raised over changes in the Earth's climatic pattern. The causes of climate change are numerous, as well as the effects of it and it is our responsibility as inhabitants of this planet to look after its well being and leave it in a better condition for future generations.

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What are climate and climate change (grades 5-8), nasa stem team, what is the difference between weather and climate, is earth’s climate changing, what is causing earth’s climate to change, what is the forecast for earth’s climate, what is the impact of earth’s warming climate, what is the difference between “climate change” and “global warming”, how does nasa study climate change, what is being done about climate change, what can you do to help, more about climate change.

This article is for students grades 5-8.

The climate of a region or city is its typical or average weather. For example, the climate of Hawaii is sunny and warm. But the climate of Antarctica is freezing cold. Earth’s climate is the average of all the world’s regional climates.

Climate change, therefore, is a change in the typical or average weather of a region or city. This could be a change in a region’s average annual rainfall, for example. Or it could be a change in a city’s average temperature for a given month or season.

Climate change is also a change in Earth’s overall climate. This could be a change in Earth’s average temperature, for example. Or it could be a change in Earth’s typical precipitation patterns.

Weather is the short-term changes we see in temperature, clouds, precipitation, humidity and wind in a region or a city. Weather can vary greatly from one day to the next, or even within the same day. In the morning the weather may be cloudy and cool. But by afternoon it may be sunny and warm.

The climate of a region or city is its weather averaged over many years. This is usually different for different seasons. For example, a region or city may tend to be warm and humid during summer. But it may tend to be cold and snowy during winter.

The climate of a city, region or the entire planet changes very slowly. These changes take place on the scale of tens, hundreds and thousands of years.

Earth’s climate is always changing. In the past, Earth’s climate has gone through warmer and cooler periods, each lasting thousands of years.

Observations show that Earth’s climate has been warming. Its average temperature has risen a little more than one degree Fahrenheit during the past 100 years or so. This amount may not seem like much. But small changes in Earth’s average temperature can lead to big impacts.

Some causes of climate change are natural. These include changes in Earth’s orbit and in the amount of energy coming from the sun. Ocean changes and volcanic eruptions are also natural causes of climate change.

Most scientists think that recent warming can’t be explained by nature alone. Most scientists say it’s very likely that most of the warming since the mid-1900s is due to the burning of coal, oil and gas. Burning these fuels is how we produce most of the energy that we use every day. This burning adds heat-trapping gases, such as carbon dioxide, into the air. These gases are called greenhouse gases.

Scientists use climate models to predict how Earth’s climate will change. Climate models are computer programs with mathematical equations. They are programmed to simulate past climate as accurately as possible. This gives scientists some confidence in a climate model’s ability to predict the future.

Climate models predict that Earth’s average temperature will keep rising over the next 100 years or so. There may be a year or years where Earth’s average temperature is steady or even falls. But the overall trend is expected to be up.

Earth’s average temperature is expected to rise even if the amount of greenhouse gases in the atmosphere decreases. But the rise would be less than if greenhouse gas amounts remain the same or increase.

Some impacts already are occurring. For example, sea levels are rising, and snow and ice cover is decreasing. Rainfall patterns and growing seasons are changing.

Further sea-level rise and melting of snow and ice are likely as Earth warms. The warming climate likely will cause more floods, droughts and heat waves. The heat waves may get hotter, and hurricanes may get stronger.

“Global warming” refers to the long-term increase in Earth’s average temperature.

“Climate change” refers to any long-term change in Earth’s climate, or in the climate of a region or city. This includes warming, cooling and changes besides temperature.

Some NASA satellites and instruments observe Earth’s land, air, water and ice. Others monitor the sun and the amount of energy coming from it. Together, these observations are important for knowing the past and present state of Earth’s climate. They are important for understanding how Earth’s climate works. And they are important for predicting future climate change.

The United States and other countries are taking steps to limit or reduce greenhouse gases in the atmosphere. These steps include using energy more efficiently and using more clean energy. Clean energy is energy that puts less or no greenhouse gases into the atmosphere. The sun, wind and water are sources of clean energy.

Many nations, states and communities are planning for climate change impacts that may be unavoidable. For example, some coastal areas are planning for flooding and land loss that may result from rising sea levels.

Another way to help is by learning about Earth and its climate. The more you know about how Earth’s climate works, the more you’ll be able to help solve problems related to climate change.

You can help by using less energy and water. For example, turn off lights and TVs when you leave a room. And turn off the water when brushing your teeth. You can help by planting trees, which absorb carbon dioxide from the atmosphere.

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Climate Change Essay

500+ words essay on climate change.

Climate change is the shift of weather patterns and conditions. We are experiencing rapid change in the climate due to various factors. Needless to say, our earth is experiencing rising global temperatures. Do you think it is a matter of concern? Well yes, you might have heard about the melting glaciers which is resulting in rising sea levels. There has been a drastic change in the climate due to hazardous factors such as pollution, burning coals, industrial waste disposal in the air, etc. All this will result in affecting the environment and its resources. To overcome the issue of climate change, you need to bring social awareness along with stringent measures to protect and preserve the environment. In this climate change essay, we are going to discuss the factors and how to prevent climate change. 

What is Climate Change? 

Climate change is the change in the average weather conditions. We can say that climate change is responsible for change in the normal climatic conditions. These changes result in heavy storms, heat waves, floods, melting glaciers, etc. Our earth is going through a lot of changes with respect to climate, which is impacting the livelihood of people and other living things. Global warming is one aspect of climate change. Due to these factors, carbon dioxide and greenhouse gases are released in the atmosphere. Check out the following causes of climate change given below. 

Climate Change Factors Essay 

Nowadays, we experience extreme weather conditions whether it is cold, heat or rain. Some of the forces or factors that contribute to climate change are greenhouse gas emission, burning of coal, deforestation, air pollution, industrial gas, etc. These factors lead to major climatic change in the earth. Did you know that climate change leads to disastrous events? Yes, it affects the livelihood, health and the resources. It also impacts the water, air and the land we live in. It leads to extreme weather conditions such as droughts, heavy rain, floods, storms, heat waves, forest fires, etc. Moreover, it reduces the quality of drinking water, damages property, pollutes the air and also leads to loss of life. Additionally, it is impacting the life of flora and fauna around us. We need to take extreme measures to prevent climate change. 

Also explore: Learn more about the environment and climate change with Environment essay and Global warming Essay .

How To Prevent Climate Change Essay 

As climate change is hampering the lives and resources of our earth, we need to look out for extreme measures to prevent climate change. Now, what can we do to prevent this? Is it possible for all of us to join and preserve nature? Yes, we can if appropriate strategies are implemented to combat climate change. The different ways to reduce climate change are mentioned below:

• Make policies and agreements on climate change.
• Implement projects on clean energy.
• Create social awareness on climate change. 
• Prohibit deforestation and cutting down trees.
• Conduct capacity building programs on climate change. 
• Keep the surroundings clean. 
• Avoid use of chemical fertilizers.
• Reduce wastage of water and other natural resources. 
• Protect the flora and fauna. 
• Buy energy efficient products and appliances. 
• Plant more trees in the neighbourhood and surrounding areas. 
• Respect the environment and protect its resources. 
• Reduce the consumption of energy.

These are the ways to reduce climate change. If not implemented, you might see an increase in the weather conditions, shortage of drinking water, agricultural yields, and impact on livelihood. Therefore, you must focus on reducing anthropogenic activities so that you can breathe fresh air and drink clean water. These are the small steps to protect the environment and its resources.

We hope this climate change essay was useful to you. Check Osmo’s essays for kids to explore more essays on a wide variety of topics. 

Frequently Asked Questions On Climate Change Essay

What is a climate change essay.

The climate change essay is information on changing weather conditions and its impact on the environment.

How to start a climate change essay?

You can start a climate change essay with an introduction, factors, and the ways to prevent climate change.

What are the main causes of climate change?

The main causes of climate change are deforestation, burning oils, chemical fertilizers, pollution and release of industrial waste in the air, etc.

To find more information, explore related articles such as technology essay and essay on internet . 

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Earth's Changing Climate

Climate change is a long-term shift in global or regional climate patterns. Often climate change refers specifically to the rise in global temperatures from the mid 20th century to present.

Earth Science, Geography, Human Geography, Physical Geography

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Climate is the long-term pattern of weather in a particular area. Weather can change from hour to hour, day to day, month to month or even from year to year. Climate refers to what the weather is generally like over 30 years or more. A desert might experience a rainy week, but over the long term, it receives very little rainfall . It has a dry climate .

Living things adjust to climates. Polar bears ( Ursus maritimus ) have adjusted to stay warm in polar climates . Over time, cacti have evolved to hold onto water in dry climates. The number of different kinds of life on Earth is partially due to the number of different climates.

Climates do change. They just change very slowly, over hundreds or even thousands of years. As climates change, organisms that live in the area must adjust, relocate , or risk dying out.

Earth's climate has changed many times. For example, fossils from the Cretaceous period (144 million to 65 million years ago) show that Earth was much warmer than it is today. Breadfruit ( Artocarpus altilis —also called "jackfruit"—trees are now found on tropical islands . However, millions of years ago they even grew on Greenland.

Earth has also experienced several major ice ages . There have been at least four in the past 500,000 years. During these periods, Earth's temperature decreased , causing ice sheets and glaciers to expand. The most recent ice age began about two million years ago and only started ending about 18,000 years ago.

Warmer temperatures have caused the glaciers to shrink. The glaciers have not disappeared completely, however—they still exist in Antarctica and Greenland. Scientists think we live in an " interglacial period ," or a time between glaciers. They have gone away somewhat for now, but hundreds of years from now, the glaciers may grow again.

Scientists who study climate look for proof of past climate change in many different places. Like clumsy criminals, glaciers leave many clues behind. They scratch and rub rocks as they move. They leave little bits of material behind known as "glacial till ." This sometimes forms mounds or ridges. Glaciers also form long, oval-shaped hills. If you see a piece of land with any of these signs, it suggests that a glacier was once there.

Some types of rocks only form from materials left behind from glaciers. When scientists find these rocks, it tells them that glaciers were once there.

Scientists also have proof of glaciers from fossils . Fossils show what kinds of animals and plants lived in certain areas. Looking for fossils of animals that lived in the cold can show scientists how far across the planet the glaciers reached.

Climate changes happen over shorter periods, as well. For example, there was a " Little Ice Age " that lasted only a few hundred years. It peaked during the 1500s and 1600s. During this time, average temperatures around the world were two to three degrees Fahrenheit cooler (about one to 1.5 degrees Celsius) than they are today. A change of one or two degrees might not seem like much, but it was enough to cause major changes. Glaciers grew larger and sometimes engulfed whole mountain villages. Winters were longer than usual, limiting the growing seasons of crops . In northern Europe, people left their farms and villages to avoid starving.

One way scientists have learned about the Little Ice Age is by studying the rings of trees. The thickness of tree rings is related to how much the tree grew each year. During times when it was very dry or very cold, trees could not grow as much and rings would be closer together.

Some climate changes are almost predictable . El Niño , which means "The Child" in Spanish, is a good example of this. El Niño refers to the warming of the surface waters in the Pacific Ocean around the equator . In normal years, winds blow across the ocean from east to west. This drags warm water along in the same direction.

Every few years, normal winds change and ocean currents reverse. This is El Niño . Warm water deepens in the eastern Pacific, near South America. This, in turn, produces big climate changes . Rain decreases in Australia and southern Asia, and crazy storms may pound Pacific islands and the west coast of the Americas. Within a year or two, El Niño ends, and climate systems return to normal.

Natural Causes of Climate Change

Climate changes happen for many reasons. Some of these reasons have to do with Earth's atmosphere . The climate change brought by El Niño , which relies on winds and ocean currents , is an example of natural changes in the atmosphere .

Natural climate change can also be affected by forces outside Earth's atmosphere . Earth's relationship to the sun also affects climate . This includes how Earth is tilted and how it orbits around the sun. These change slowly over time and affect how much of the sun's light reaches different parts of the world at different times. The 100,000-year cycles of ice ages are most likely caused by changes in these things.

Large meteorites hitting Earth could also cause climate change . If a meteor hit Earth, it would send millions of tons of dirt and dust into the atmosphere . This would block some of the sun's rays, making it cold and dark. Many plants and animals would die. Many paleontologists believe that dinosaurs went extinct partially due to a meteor or comet hitting Earth. Dinosaurs could not survive in a cool, dark climate . Their bodies could not adjust to the cold, and the dark killed many plants that they ate. Without the plants , the plant -eating dinosaurs died. And without those plant -eating dinosaurs , the dinosaurs that ate them died too.

Plate tectonics also play a role in climate changes . Earth is made of many layers. The top part is the crust, and just beneath that is the mantle. Together, these make up the "plates" in plate tectonics . We now know there are 15 major plates that cover the planet's surface. They move about as fast as our fingernails grow.

Earth's continental plates have moved a great deal over time. More than 200 million years ago, the continents were merged together as one giant landmass called Pangaea . As the continents broke apart and moved, their positions on Earth changed. The movements of ocean currents also changed. Both of these changes affected climate .

Another cause of climate change is called the greenhouse effect . The greenhouse effect happens when gases like carbon dioxide trap the sun's heat in the atmosphere . Gases that do this are called greenhouse gases . They keep Earth warm. Without any greenhouse gases in the atmosphere , most life on Earth would freeze to death. However, adding too much of these gases to the atmosphere slowly makes the planet warmer.

Human Causes of Climate Change

Some human activities release greenhouse gases . For example, humans burn fossil fuels such as coal , oil and natural gas . People often use them for transportation and electricity . Burning fossil fuels releases greenhouse gases , like carbon dioxide . Trees soak up carbon dioxide , so cutting down forests also adds to the greenhouse effect . Factories send greenhouse gases into the atmosphere too.

Many scientists are worried that these activities are causing dangerous changes in Earth's climate . Average temperatures around the world have risen since about 1880. The seven warmest years of the 1900s happened in the 1990s. This warming trend may be a sign that the greenhouse effect is increasing because of human activity. This is often referred to as " global warming ." It is estimated that humans have increased the amount of carbon dioxide in the atmosphere by about 30 percent in the past 150 years.

Other greenhouse gases are increasing, as well. Methane is an example. Methane is a greenhouse gas produced by rotting plants and animals . As populations grow, they use more goods and throw away more. Large landfills , filled with rotting waste, release tons of methane into the atmosphere .

Some chemicals that are used in refrigeration, air conditioning, and aerosol sprays are also greenhouse gases. Many countries are working to get rid of them. Some have laws to prevent companies from manufacturing them.

Global Warming

As the amount of greenhouse gases in the atmosphere rises, so does the temperature of Earth. Scientists worry that the temperature will increase so much that ice caps will begin seriously melting within the next several decades . This would cause the sea level to rise. Coastal areas and small islands would be flooded. Severe climate change may bring more severe weather patterns . This could include more hurricanes , typhoons , and tornadoes . More rain and snow would fall in some places and far less in others. Places where crops now grow could become deserts .

As climates change, so do the homes for many living things. Animals may not be able to survive in their current homes. Many human societies depend on specific crops for food , clothing, and trade . If the climate of an area changes, the same crops may not grow. Some scientists worry that as the planet warms, tropical diseases will spread further.

The temperature will continue to rise unless steps are taken to stop it. Most scientists agree that we must reduce the amount of greenhouse gases released into the atmosphere. There are many ways to do this, including:

• Drive less. Use public transportation , carpool , walk, or ride a bike.
• Fly less. Airplanes produce huge amounts of greenhouse gas emissions .
• Reduce, reuse, and recycle.
• Plant a tree. Trees soak up carbon dioxide, keeping it out of the atmosphere.
• Use less electricity.
• Eat less meat. Cows are one of the biggest methane producers.
• Support alternative power sources that don't burn fossil fuels. These include power that comes from the sun and from wind.

The climate has changed many times during Earth's history. However, those changes have happened slowly, over thousands of years. Only since the Industrial Revolution have human activities begun to influence climate. Scientists are still working to understand what the consequences might be.

Cool Warming Could the current phase of climate change cause another Little Ice Age? As strange as it sounds, some scientists believe it could. If melting glaciers release large amounts of freshwater into the oceans, this could disrupt the ocean conveyor belt, an important circulation system that moves seawater around the globe. Stopping this cycle could possibly cause cooling of 3 to 5 degrees Celsius (5-9 degrees Fahrenheit) in the ocean and atmosphere.

Early Squirrels The North American red squirrel has started breeding earlier in the year as a result of climate change. Food becomes available to the squirrels earlier because of warmer winters.

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Related Resources

Introduction to Climate Change

Our climate is changing (filo, iStockphoto)

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Learn more about the causes and impacts of global climate change.

What is climate change?

Climate change  is a change in the usual weather patterns in a region over time. Temperatures on Earth have been rising dramatically for many years. This change is impacting local climates all around the world.

Changes in  weather  happen all the time. But weather and  climate  are not the same thing. Weather is the day to day change in temperature and precipitation in a place. You can describe the weather in your community by looking outside. If it’s cold and snowy right now, that’s today’s weather.

Climate , on the other hand, is the usual weather in a place over a long period of time. Weather can change quickly. It might be sunny in the morning and rainy in the afternoon. Climate changes much more slowly. Until recently, Earth’s climate had been about the same for  9000 years .

Shown is a colour illustration of a set of clothes for one day, labelled “Weather,” and a closet full of clothes, labelled “Climate.” On the top left of the image is the title “Weather” in black letters. Below, a subtitle reads “What you wear each day.” Below, several items of clothing and a yellow sun are against a green background. These include a baseball cap, sunglasses, t-shirt, shorts, and flip flops.  On the top right of the image is the title "Climate" in black letters. Below, a subtitle reads“What you wear over the year”. Below is a wardrobe with both doors open. Inside, clothes are hanging on the doors and piled on shelves. These include jackets, jeans, sweaters, a vest, t-shirts, scarves, toques and mittens. On the floor in front are winter boots, running shoes, brown shoes and an umbrella.

How do we know the world’s climate is changing?

The world’s average temperature has  changed throughout history . Sometimes the world’s temperature has been warmer and sometimes it has been colder. Factors like ocean currents and volcanic eruptions caused these shifts. They are part of a natural cycle of heating and cooling. This usually happens over tens of thousands of years.

Shown is a black and white graph that shows the change in global surface temperature compared to the long-term average.  The y axis is labelled “Temperature Anomaly (C)". It runs from -0.5 to 1.5. The x axis is labelled “Year.” It runs from 1880 to 2020. A wavy, black horizontal line shows an overview of the temperature anomaly through the years. Small grey dots are shown above and below this, representing specific anomalies. Between 1880 and 1980, the line dips just above and below 0.0 degrees Celsius. From 1980 to 2020, the line slopes up, reaching 1 degree Celsius.

But now Earth’s climate is changing faster than it ever has during human history. Earth’s average temperature has increased by at least 1.1 °C since 1880. And most of that warming has happened since 1975. In fact, 2023 will probably be the warmest year ever recorded . 

This trend of rising global temperatures is called Global warming . Global warming is one of the ways that Earth’s climate is changing. Climate change also involves changing global weather patterns, ocean currents, and other systems.

We are already experiencing these changes. Scientists have observed  rising sea levels, melting ice and increasing extreme weather events . These changes affect each region differently. For example, snow and ice are melting so quickly that the Arctic could have no summer sea ice by 2030 . Coastal areas are experiencing more flooding . These are all evidence of climate change.

Shown is a colour illustration of an area of ice around Earth’s north pole, with a line showing a larger area between 1981 and 2010. Near the centre of the image is a dark blue sunburst representing the north pole. It is surrounded by an uneven blob of cloudy white. The edges of this area fade into the dark blue that represents water. The ice extends to northern Canada and Greenland, but does not touch Russia or Europe. Outside this area, a wavy yellow line in the water is labelled “median extent 1981-2010.” This extends much further, touching northern Russia, coming close to Alaska, and halfway down the coast of Greenland.

Why is the climate changing?

These changes to Earth’s climate are not natural shifts. Scientists are confident that human activities are the leading cause of climate change. Human activities release gases that change Earth’s atmosphere. These gases are making our atmosphere better at trapping the Sun's heat. We call this the  greenhouse effect . The greenhouse effect is the main cause of rising temperatures on Earth.

So what is the greenhouse effect? Plants can grow better in a greenhouse because it stays warmer than the outside air. This is because heat from the Sun enters through clear glass or plastic, then gets trapped inside. This heat keeps the greenhouse warm.

Shown is a colour illustration of sunbeams shining into a glass greenhouse, where they are trapped.  The beams are long yellow arrows that stretch diagonally down from the Sun at the top left of the image. They go through the roof and walls of the greenhouse. There, they bounce up from the plants on the ground, and stop when they hit the roof above.  Outside the greenhouse, the ground is covered in snow. To the left, a snowman has a worried expression.

Earth’s atmosphere also acts like a greenhouse. Sunlight reaches our planet and warms it. Some of this heat is reflected back into space. Some of it is trapped by gases in Earth’s atmosphere. These  greenhouse gases  include  carbon dioxide  (CO 2 ), water vapour, methane, and nitrous oxide.

A simplified animation of the greenhouse effect (Source: ESA ).

Shown is a colour animation illustrating how heat from sunlight is trapped in Earth’s atmosphere. The title “The Greenhouse Effect” is in bold letters at the top right. Earth is shown as a half circle at the bottom of the screen. There is a thick stripe of misty, pale blue above the surface. A blue line along the top of this area is labelled “Atmosphere.” The Sun is shown as a glowing white circle in the top left corner.  First, curved white lines radiate down from the sun, through space to the surface of Earth. Text appears reading “Sunlight reaches the Earth.” Next, smaller, fainter curved lines radiate from Earth, up into space. Text appears reading “Some energy is reflected back to space.” Then, text appears reading “Some is absorbed and re-radiated as heat.” Earth’s atmosphere begins to turn from blue to pink. Finally, bursts of bright orange arrows appear in the atmosphere. Text appears reading “Most of the heat is reflected by greenhouse gases and then radiated in all directions, warming the Earth.”

The greenhouse gases in our atmosphere help keep our planet warm enough for us to survive. Too little greenhouse gas would make Earth too cold for humans. But, too much greenhouse gas makes Earth too warm. Over the past century, humans have added a lot of greenhouse gases to our atmosphere.

Did you know? The average temperature on Earth would be  -18°C without the greenhouse effect . 

Carbon dioxide  is the most common greenhouse gas in our atmosphere. Carbon moves between the Earth, living things, and the atmosphere in the  carbon cycle . Like all animals, humans add carbon dioxide to the atmosphere when we breathe. We also  emit  a lot more carbon dioxide when we burn  fossil fuels . These are fuels we dig up like oil, gas and coal which are made of plant and animal remains from millions of years ago. We burn fossil fuels when we drive cars, heat our homes, and generate electricity. Humans have burned large amounts of fossil fuels over the last century.

The amount of carbon dioxide in the air is now nearly 50% more than in 1750. About 25% of that change has happened since 2000 . Carbon dioxide concentrations haven’t been so high for  over three million years .

Shown is a line graph overlaid on a colour photograph of Earth’s atmosphere.  The x axis is labelled “years before today (0 = 1950).” This runs from 800,000 on the left to 0 on the right. The y axis is labelled “carbon dioxide levels (parts per million).” This runs from 160 at the bottom to 480 at the top. A horizontal, dotted line crosses the whole graph at 300 ppm. This is labelled “For millennia, carbon dioxide had never been above this line.” Below, the jagged line representing carbon dioxide levels zig-zags up and down 800, 000 years before today to almost 0. Just before 0, the line shoots up past 300 ppm, becoming completely vertical. Just over 300 ppm, this is labelled “1950 level.” The top of this, about 420 ppm, is labelled “current level.” The photograph in the background shows streaks of colour indicating sun and clouds at Earth’s surface, and blue sky darkening into black space.

Methane  (CH 4 ) is the next most common greenhouse gas. Methane has about 80 times the warming power of carbon dioxide. This makes methane an important gas to keep an eye on. The  main sources of methane in Canada  are from fossil fuels use,  farming , and waste.

What are the impacts of climate change?

Increasing the global temperature by a few degrees may not seem that bad. This is especially true if you live in a relatively cold country like Canada. But, think about how you feel when you have a fever.  Raising your body temperature by just a couple degrees  can make you feel terrible. Like our bodies, Earth is a series of intertwined systems. Rising global temperatures have complex and sometimes unexpected impacts that affect us all. These can already be felt in Canada and around the world .

The impacts of climate change are complex. And they are different for every region. In some places, higher temperatures have already led to megadroughts and heat waves . They are also causing extreme rain and snowstorms in some places. Climate change could continue causing melting sea ice , glaciers , warming oceans , and rising sea levels . These changes impact people , plants, and animals .

Shown is a colour photograph of dry, cracked mud with puddles of water. The camera is focused on a light brown, nearly flat surface in the foreground. Here, mud has dried forming deep, jagged cracks. On the right and left, wide, shallow puddles of brown water gleam in the sun.  In the background, the Sun peeks out over low, hazy, blue green mountains.

Additionally, climate change will continue to affect our planet for many years. Carbon dioxide stays in the atmosphere for hundreds of years. It can take some time for Earth's complex systems to respond to changes.

How can we tackle this problem?

Our response will determine how much our climate will change. There are two main ways to deal with climate change. These are adaptation and mitigation.  Adaptation  is about finding ways to cope with our changing climate. For example, cities could adapt to rising sea levels by building walls or using pumps to prevent flooding.

Shown is a colour photograph of a pile of sandbags on a street filled with water.  The camera is focused on a concrete barrier in the foreground. It is covered in a sheet of plastic and topped with small cinched white bags filled with a heavy material. In the background, a street is filled with water. A row of houses on the right is blocked off with yellow caution tape.

Mitigation  is about finding ways to reduce greenhouse gas emissions. For example, we could burn less fossil fuel by using cars and other gas-powered vehicles less. We can also use solar or wind power, instead of fossil fuels, to generate electricity. These changes need work and cooperation from people around the world.

Shown is a colour photograph of three wind turbines and two rows of solar panels. The camera is focused on the blue, gridded panels in the foreground. The backs of another row of panels is visible to the left. Both rows stretch toward the horizon. The Sun is close to the horizon and its light is reflecting off the panels. The wind turbines are in the background, silhouetted against blue and gold sky.

Climate change is a difficult issue to solve because of its global scale and complexity. Luckily,  many people  are concerned about climate change.  Young people in particular  are encouraging governments and businesses to take action. Many organizations are trying to reduce greenhouse gas emissions.  Government plans ,  international agreements , and  emerging technologies  will all need to play a role. There is a lot of work and research that still needs to be done. But we humans are up for it!

What is the Greenhouse Effect? Learn more about the greenhouse effect with this hands-on activity from Let’s Talk Science. 

Timelapse - Warming Planet (2023) See how Earth has changed since 1987 with images of melting ice and glaciers, shrinking lakes, increasing fires, and extreme weather.

What is Climate Change? Learn more about climate change from NASA Kids. 

Why Does Climate Change Matter NASA Earth Minute: Usual Suspects (2023) This video (1:34 min.) from NASA explains how we are already feeling the effects of climate change, and how scientists are helping us understand and prepare for it.

Climate 101 with Bill Nye  (2012) Learn about the basics of climate change in this video (4:33 min.) with Bill Nye.

Climate Reality Project. (November 7, 2019).  Climate Adaptation vs.Mitigation: What’s the Difference and Why Does it Matter?  

NASA. (n.d.).  Global Climate Change . 

NASA. (n.d.).  How do we know the climate is changing? 

NASA. (n.d.).  What is the greenhouse effect?

NOAA. (August 7, 2020).  Climate is what you expect, weather is what you get

Oss Foundation. (2014).  Milankovitch Cycles .

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Home / For Educators: Grades 6-12

For Educators: Grades 6-12

Climate change is a complex topic to teach. In addition to teaching the science behind climate change, it is critical to help students become effective climate change communicators.

We have developed materials for teachers who are interested in using our resources in their classrooms, such as the Yale Climate Opinion Maps and Yale Climate Connections. These materials were developed based on recommendations from educators across the United States. They aim to immerse students in climate change issues in an accessible, digestible, and interactive way. While these NGSS and Common Core-aligned activities were designed for middle and high schoolers, you can easily convert them to Word documents using free platforms like https://simplypdf.com/ so that you can customize them for your students. We’d also love to hear about your experience using our materials with your students! Please fill out this brief survey .

• Audio Story

Backgrounders for Educators

• Climate Change Audiences
• Interactive Maps
• Intermediate
• Introductory

Climate Change Basics: Five Facts, Ten Words

To simplify the scientific complexity of climate change, we focus on communicating five key facts about climate change that everyone should know. 

Climate Change Communication Investigation

Advanced Interactive Maps

The Yale Climate Opinion Maps help us compare Americans’ beliefs around climate change across different parts of the country. For this project, students will get to be researchers collecting data in their own communities, just like the researchers at YPCCC.

Climate Change Jigsaw

Introductory Audio Story

This Jigsaw exercise offers two ways in which students can discuss our radio stories as a team to deepen thinking around climate change issues.

Climate Explained: Introductory Essays About Climate Change Topics

Climate Explained, a part of Yale Climate Connections, is an essay collection that addresses an array of climate change questions and topics, including why it’s cold outside if global warming is real, how we know that humans are responsible for global warming, and the relationship between climate change and national security.  

Connecting Data to Storytelling

Advanced Audio Story

There are many ways to tell stories. We can write, speak, or even use art to tell a story. Data can tell a story, too. In this activity, students will draw connections between a Yale Climate Connections radio story and data from the Yale Climate Opinion Maps.

Decoding the Data

Intermediate Climate Change Audiences

This activity is inspired by the New York Times What’s Going On in This Graph? feature and offers students the chance to practice their data interpretation skills.

External Resources

Looking for resources to help you and your students build a solid climate change science foundation? We’ve compiled a list of reputable, student-friendly links to help you do just that!  

Meet Global Warming’s Six Americas

Introductory Climate Change Audiences

Our research has identified “Global Warming’s Six Americas” as six unique audiences within the American public that each responds to the issue of climate change in a distinct way. Introduce Global Warming’s Six Americas to your students with this text.

Navigating the Yale Climate Opinion Maps

Intermediate Interactive Maps

The Yale Climate Opinion Maps tool is a way to explore how Americans’ climate change beliefs vary across the country. Navigating the Yale Climate Opinion Maps is a question guide that will help students use this interactive tool. 

Question Bank

Use this Question Bank as a guide to discuss any of our 90-second daily podcasts! These questions can help start a full class conversation, be used in small group discussion, or function as writing prompts.

Re-representing a Climate Change Story

Intermediate Audio Story

Stories can build understanding around a topic and can also help students explore connections between classroom content and their own lives. In this activity, students will get to be the storyteller and will choose how they would like to retell one of our radio stories.

Role Play: Six Americas, Six Views on Global Warming

Advanced Climate Change Audiences

An important part of stopping climate change is being able to communicate with people who may have different opinions about it. This is an exercise to help students practice engaging with people of varying perspectives.

What is a Survey?

This annotated list of links can be used to teach your students about surveying in general and scientific polling in particular. These resources can help answer questions about what polls are, why we use polling and surveying, and what reliable survey data shows us.   

Why should we care about climate change?

Having different perspectives about global warming is natural, but the most important thing that anyone should know about climate change is why it matters.  

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What Is Climate Change?

Weather vs. climate.

Weather describes the conditions outside right now in a specific place. For example, if you see that it’s raining outside right now, that’s a way to describe today’s weather. Rain, snow, wind, hurricanes, tornadoes — these are all weather events.

Climate , on the other hand, is more than just one or two rainy days. Climate describes the weather conditions that are expected in a region at a particular time of year.

Is it usually rainy or usually dry? Is it typically hot or typically cold? A region’s climate is determined by observing its weather over a period of many years—generally 30 years or more.

So, for example, one or two weeks of rainy weather wouldn’t change the fact that Phoenix typically has a dry, desert climate . Even though it’s rainy right now, we still expect Phoenix to be dry because that's what is usually the case.

Want to know more about the difference between weather and climate? Take a look at this video !

Alaska's Muir glacier in August 1941 and August 2004. Significant changes occurred in the 63 years between these two photos. Credit: USGS

Climate change describes a change in the average conditions — such as temperature and rainfall — in a region over a long period of time. For example, 20,000 years ago, much of the United States was covered in glaciers. In the United States today, we have a warmer climate and fewer glaciers.

Global climate change refers to the average long-term changes over the entire Earth. These include warming temperatures and changes in precipitation, as well as the effects of Earth’s warming, such as:

• Rising sea levels
• Shrinking mountain glaciers
• Ice melting at a faster rate than usual in Greenland, Antarctica and the Arctic
• Changes in flower and plant blooming times.

Earth’s climate has constantly been changing — even long before humans came into the picture. However, scientists have observed unusual changes recently. For example, Earth’s average temperature has been increasing much more quickly than they would expect over the past 150 years.

Want to know more about how we know climate change is happening? Check it all out here !

How Much Is Earth’s Climate Changing Right Now?

Graph of change in annual global temperatures, compared to the average of global annual temperatures from 1880-1899. Credit: NASA's Goddard Space Flight Center

Some parts of Earth are warming faster than others. But on average, global air temperatures near Earth's surface have gone up about 2 degrees Fahrenheit in the past 100 years. In fact, the past five years have been the warmest five years in centuries.

Many people, including scientists, are concerned about this warming. As Earth’s climate continues to warm, the intensity and amount of rainfall during storms such as hurricanes is expected to increase. Droughts and heat waves are also expected to become more intense as the climate warms.

When the whole Earth’s temperature changes by one or two degrees, that change can have big impacts on the health of Earth's plants and animals, too.

What Causes Climate Change?

A simplified animation of the greenhouse effect. Credit: NASA/JPL-Caltech

There are lots of factors that contribute to Earth’s climate. However, scientists agree that Earth has been getting warmer in the past 50 to 100 years due to human activities.

Certain gases in Earth’s atmosphere block heat from escaping. This is called the greenhouse effect . These gases keep Earth warm like the glass in a greenhouse keeps plants warm.

Human activities — such as burning fuel to power factories, cars and buses — are changing the natural greenhouse. These changes cause the atmosphere to trap more heat than it used to, leading to a warmer Earth.

Does What We Do Matter?

This video shows how Arctic sea ice has been changing since 1984. Credit: NASA

Yes. When human activities create greenhouse gases, Earth warms. This matters because oceans, land, air, plants, animals and energy from the Sun all have an effect on one another. The combined effects of all these things give us our global climate . In other words, Earth’s climate functions like one big, connected system.

Thinking about things as systems means looking for how every part relates to others. NASA’s Earth observing satellites collect information about how our planet’s atmosphere , water and land are changing.

By looking at this information, scientists can observe how Earth’s systems work together. This will help us understand how small changes in one place can contribute to bigger changes in Earth’s global climate.

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The Science of Climate Change Explained: Facts, Evidence and Proof

Definitive answers to the big questions.

Credit... Photo Illustration by Andrea D'Aquino

Supported by

By Julia Rosen

Ms. Rosen is a journalist with a Ph.D. in geology. Her research involved studying ice cores from Greenland and Antarctica to understand past climate changes.

• Published April 19, 2021 Updated Nov. 6, 2021

The science of climate change is more solid and widely agreed upon than you might think. But the scope of the topic, as well as rampant disinformation, can make it hard to separate fact from fiction. Here, we’ve done our best to present you with not only the most accurate scientific information, but also an explanation of how we know it.

How do we know climate change is really happening?

How much agreement is there among scientists about climate change, do we really only have 150 years of climate data how is that enough to tell us about centuries of change, how do we know climate change is caused by humans, since greenhouse gases occur naturally, how do we know they’re causing earth’s temperature to rise, why should we be worried that the planet has warmed 2°f since the 1800s, is climate change a part of the planet’s natural warming and cooling cycles, how do we know global warming is not because of the sun or volcanoes, how can winters and certain places be getting colder if the planet is warming, wildfires and bad weather have always happened. how do we know there’s a connection to climate change, how bad are the effects of climate change going to be, what will it cost to do something about climate change, versus doing nothing.

Climate change is often cast as a prediction made by complicated computer models. But the scientific basis for climate change is much broader, and models are actually only one part of it (and, for what it’s worth, they’re surprisingly accurate ).

For more than a century , scientists have understood the basic physics behind why greenhouse gases like carbon dioxide cause warming. These gases make up just a small fraction of the atmosphere but exert outsized control on Earth’s climate by trapping some of the planet’s heat before it escapes into space. This greenhouse effect is important: It’s why a planet so far from the sun has liquid water and life!

However, during the Industrial Revolution, people started burning coal and other fossil fuels to power factories, smelters and steam engines, which added more greenhouse gases to the atmosphere. Ever since, human activities have been heating the planet.

We know this is true thanks to an overwhelming body of evidence that begins with temperature measurements taken at weather stations and on ships starting in the mid-1800s. Later, scientists began tracking surface temperatures with satellites and looking for clues about climate change in geologic records. Together, these data all tell the same story: Earth is getting hotter.

Average global temperatures have increased by 2.2 degrees Fahrenheit, or 1.2 degrees Celsius, since 1880, with the greatest changes happening in the late 20th century. Land areas have warmed more than the sea surface and the Arctic has warmed the most — by more than 4 degrees Fahrenheit just since the 1960s. Temperature extremes have also shifted. In the United States, daily record highs now outnumber record lows two-to-one.

Where it was cooler or warmer in 2020 compared with the middle of the 20th century

This warming is unprecedented in recent geologic history. A famous illustration, first published in 1998 and often called the hockey-stick graph, shows how temperatures remained fairly flat for centuries (the shaft of the stick) before turning sharply upward (the blade). It’s based on data from tree rings, ice cores and other natural indicators. And the basic picture , which has withstood decades of scrutiny from climate scientists and contrarians alike, shows that Earth is hotter today than it’s been in at least 1,000 years, and probably much longer.

In fact, surface temperatures actually mask the true scale of climate change, because the ocean has absorbed 90 percent of the heat trapped by greenhouse gases . Measurements collected over the last six decades by oceanographic expeditions and networks of floating instruments show that every layer of the ocean is warming up. According to one study , the ocean has absorbed as much heat between 1997 and 2015 as it did in the previous 130 years.

We also know that climate change is happening because we see the effects everywhere. Ice sheets and glaciers are shrinking while sea levels are rising. Arctic sea ice is disappearing. In the spring, snow melts sooner and plants flower earlier. Animals are moving to higher elevations and latitudes to find cooler conditions. And droughts, floods and wildfires have all gotten more extreme. Models predicted many of these changes, but observations show they are now coming to pass.

Back to top .

There’s no denying that scientists love a good, old-fashioned argument. But when it comes to climate change, there is virtually no debate: Numerous studies have found that more than 90 percent of scientists who study Earth’s climate agree that the planet is warming and that humans are the primary cause. Most major scientific bodies, from NASA to the World Meteorological Organization , endorse this view. That’s an astounding level of consensus given the contrarian, competitive nature of the scientific enterprise, where questions like what killed the dinosaurs remain bitterly contested .

Scientific agreement about climate change started to emerge in the late 1980s, when the influence of human-caused warming began to rise above natural climate variability. By 1991, two-thirds of earth and atmospheric scientists surveyed for an early consensus study said that they accepted the idea of anthropogenic global warming. And by 1995, the Intergovernmental Panel on Climate Change, a famously conservative body that periodically takes stock of the state of scientific knowledge, concluded that “the balance of evidence suggests that there is a discernible human influence on global climate.” Currently, more than 97 percent of publishing climate scientists agree on the existence and cause of climate change (as does nearly 60 percent of the general population of the United States).

So where did we get the idea that there’s still debate about climate change? A lot of it came from coordinated messaging campaigns by companies and politicians that opposed climate action. Many pushed the narrative that scientists still hadn’t made up their minds about climate change, even though that was misleading. Frank Luntz, a Republican consultant, explained the rationale in an infamous 2002 memo to conservative lawmakers: “Should the public come to believe that the scientific issues are settled, their views about global warming will change accordingly,” he wrote. Questioning consensus remains a common talking point today, and the 97 percent figure has become something of a lightning rod .

To bolster the falsehood of lingering scientific doubt, some people have pointed to things like the Global Warming Petition Project, which urged the United States government to reject the Kyoto Protocol of 1997, an early international climate agreement. The petition proclaimed that climate change wasn’t happening, and even if it were, it wouldn’t be bad for humanity. Since 1998, more than 30,000 people with science degrees have signed it. However, nearly 90 percent of them studied something other than Earth, atmospheric or environmental science, and the signatories included just 39 climatologists. Most were engineers, doctors, and others whose training had little to do with the physics of the climate system.

A few well-known researchers remain opposed to the scientific consensus. Some, like Willie Soon, a researcher affiliated with the Harvard-Smithsonian Center for Astrophysics, have ties to the fossil fuel industry . Others do not, but their assertions have not held up under the weight of evidence. At least one prominent skeptic, the physicist Richard Muller, changed his mind after reassessing historical temperature data as part of the Berkeley Earth project. His team’s findings essentially confirmed the results he had set out to investigate, and he came away firmly convinced that human activities were warming the planet. “Call me a converted skeptic,” he wrote in an Op-Ed for the Times in 2012.

Mr. Luntz, the Republican pollster, has also reversed his position on climate change and now advises politicians on how to motivate climate action.

A final note on uncertainty: Denialists often use it as evidence that climate science isn’t settled. However, in science, uncertainty doesn’t imply a lack of knowledge. Rather, it’s a measure of how well something is known. In the case of climate change, scientists have found a range of possible future changes in temperature, precipitation and other important variables — which will depend largely on how quickly we reduce emissions. But uncertainty does not undermine their confidence that climate change is real and that people are causing it.

Earth’s climate is inherently variable. Some years are hot and others are cold, some decades bring more hurricanes than others, some ancient droughts spanned the better part of centuries. Glacial cycles operate over many millenniums. So how can scientists look at data collected over a relatively short period of time and conclude that humans are warming the planet? The answer is that the instrumental temperature data that we have tells us a lot, but it’s not all we have to go on.

Historical records stretch back to the 1880s (and often before), when people began to regularly measure temperatures at weather stations and on ships as they traversed the world’s oceans. These data show a clear warming trend during the 20th century.

Global average temperature compared with the middle of the 20th century

+0.75°C

–0.25°

Some have questioned whether these records could be skewed, for instance, by the fact that a disproportionate number of weather stations are near cities, which tend to be hotter than surrounding areas as a result of the so-called urban heat island effect. However, researchers regularly correct for these potential biases when reconstructing global temperatures. In addition, warming is corroborated by independent data like satellite observations, which cover the whole planet, and other ways of measuring temperature changes.

Much has also been made of the small dips and pauses that punctuate the rising temperature trend of the last 150 years. But these are just the result of natural climate variability or other human activities that temporarily counteract greenhouse warming. For instance, in the mid-1900s, internal climate dynamics and light-blocking pollution from coal-fired power plants halted global warming for a few decades. (Eventually, rising greenhouse gases and pollution-control laws caused the planet to start heating up again.) Likewise, the so-called warming hiatus of the 2000s was partly a result of natural climate variability that allowed more heat to enter the ocean rather than warm the atmosphere. The years since have been the hottest on record .

Still, could the entire 20th century just be one big natural climate wiggle? To address that question, we can look at other kinds of data that give a longer perspective. Researchers have used geologic records like tree rings, ice cores, corals and sediments that preserve information about prehistoric climates to extend the climate record. The resulting picture of global temperature change is basically flat for centuries, then turns sharply upward over the last 150 years. It has been a target of climate denialists for decades. However, study after study has confirmed the results , which show that the planet hasn’t been this hot in at least 1,000 years, and probably longer.

Scientists have studied past climate changes to understand the factors that can cause the planet to warm or cool. The big ones are changes in solar energy, ocean circulation, volcanic activity and the amount of greenhouse gases in the atmosphere. And they have each played a role at times.

For example, 300 years ago, a combination of reduced solar output and increased volcanic activity cooled parts of the planet enough that Londoners regularly ice skated on the Thames . About 12,000 years ago, major changes in Atlantic circulation plunged the Northern Hemisphere into a frigid state. And 56 million years ago, a giant burst of greenhouse gases, from volcanic activity or vast deposits of methane (or both), abruptly warmed the planet by at least 9 degrees Fahrenheit, scrambling the climate, choking the oceans and triggering mass extinctions.

In trying to determine the cause of current climate changes, scientists have looked at all of these factors . The first three have varied a bit over the last few centuries and they have quite likely had modest effects on climate , particularly before 1950. But they cannot account for the planet’s rapidly rising temperature, especially in the second half of the 20th century, when solar output actually declined and volcanic eruptions exerted a cooling effect.

That warming is best explained by rising greenhouse gas concentrations . Greenhouse gases have a powerful effect on climate (see the next question for why). And since the Industrial Revolution, humans have been adding more of them to the atmosphere, primarily by extracting and burning fossil fuels like coal, oil and gas, which releases carbon dioxide.

Bubbles of ancient air trapped in ice show that, before about 1750, the concentration of carbon dioxide in the atmosphere was roughly 280 parts per million. It began to rise slowly and crossed the 300 p.p.m. threshold around 1900. CO2 levels then accelerated as cars and electricity became big parts of modern life, recently topping 420 p.p.m . The concentration of methane, the second most important greenhouse gas, has more than doubled. We’re now emitting carbon much faster than it was released 56 million years ago .

30 billion metric tons

Carbon dioxide emitted worldwide 1850-2017

Rest of world

Other developed

European Union

Developed economies

Other countries

United States

E.U. and U.K.

These rapid increases in greenhouse gases have caused the climate to warm abruptly. In fact, climate models suggest that greenhouse warming can explain virtually all of the temperature change since 1950. According to the most recent report by the Intergovernmental Panel on Climate Change, which assesses published scientific literature, natural drivers and internal climate variability can only explain a small fraction of late-20th century warming.

Another study put it this way: The odds of current warming occurring without anthropogenic greenhouse gas emissions are less than 1 in 100,000 .

But greenhouse gases aren’t the only climate-altering compounds people put into the air. Burning fossil fuels also produces particulate pollution that reflects sunlight and cools the planet. Scientists estimate that this pollution has masked up to half of the greenhouse warming we would have otherwise experienced.

Greenhouse gases like water vapor and carbon dioxide serve an important role in the climate. Without them, Earth would be far too cold to maintain liquid water and humans would not exist!

Here’s how it works: the planet’s temperature is basically a function of the energy the Earth absorbs from the sun (which heats it up) and the energy Earth emits to space as infrared radiation (which cools it down). Because of their molecular structure, greenhouse gases temporarily absorb some of that outgoing infrared radiation and then re-emit it in all directions, sending some of that energy back toward the surface and heating the planet . Scientists have understood this process since the 1850s .

Greenhouse gas concentrations have varied naturally in the past. Over millions of years, atmospheric CO2 levels have changed depending on how much of the gas volcanoes belched into the air and how much got removed through geologic processes. On time scales of hundreds to thousands of years, concentrations have changed as carbon has cycled between the ocean, soil and air.

Today, however, we are the ones causing CO2 levels to increase at an unprecedented pace by taking ancient carbon from geologic deposits of fossil fuels and putting it into the atmosphere when we burn them. Since 1750, carbon dioxide concentrations have increased by almost 50 percent. Methane and nitrous oxide, other important anthropogenic greenhouse gases that are released mainly by agricultural activities, have also spiked over the last 250 years.

We know based on the physics described above that this should cause the climate to warm. We also see certain telltale “fingerprints” of greenhouse warming. For example, nights are warming even faster than days because greenhouse gases don’t go away when the sun sets. And upper layers of the atmosphere have actually cooled, because more energy is being trapped by greenhouse gases in the lower atmosphere.

We also know that we are the cause of rising greenhouse gas concentrations — and not just because we can measure the CO2 coming out of tailpipes and smokestacks. We can see it in the chemical signature of the carbon in CO2.

Carbon comes in three different masses: 12, 13 and 14. Things made of organic matter (including fossil fuels) tend to have relatively less carbon-13. Volcanoes tend to produce CO2 with relatively more carbon-13. And over the last century, the carbon in atmospheric CO2 has gotten lighter, pointing to an organic source.

We can tell it’s old organic matter by looking for carbon-14, which is radioactive and decays over time. Fossil fuels are too ancient to have any carbon-14 left in them, so if they were behind rising CO2 levels, you would expect the amount of carbon-14 in the atmosphere to drop, which is exactly what the data show .

It’s important to note that water vapor is the most abundant greenhouse gas in the atmosphere. However, it does not cause warming; instead it responds to it . That’s because warmer air holds more moisture, which creates a snowball effect in which human-caused warming allows the atmosphere to hold more water vapor and further amplifies climate change. This so-called feedback cycle has doubled the warming caused by anthropogenic greenhouse gas emissions.

A common source of confusion when it comes to climate change is the difference between weather and climate. Weather is the constantly changing set of meteorological conditions that we experience when we step outside, whereas climate is the long-term average of those conditions, usually calculated over a 30-year period. Or, as some say: Weather is your mood and climate is your personality.

So while 2 degrees Fahrenheit doesn’t represent a big change in the weather, it’s a huge change in climate. As we’ve already seen, it’s enough to melt ice and raise sea levels, to shift rainfall patterns around the world and to reorganize ecosystems, sending animals scurrying toward cooler habitats and killing trees by the millions.

It’s also important to remember that two degrees represents the global average, and many parts of the world have already warmed by more than that. For example, land areas have warmed about twice as much as the sea surface. And the Arctic has warmed by about 5 degrees. That’s because the loss of snow and ice at high latitudes allows the ground to absorb more energy, causing additional heating on top of greenhouse warming.

Relatively small long-term changes in climate averages also shift extremes in significant ways. For instance, heat waves have always happened, but they have shattered records in recent years. In June of 2020, a town in Siberia registered temperatures of 100 degrees . And in Australia, meteorologists have added a new color to their weather maps to show areas where temperatures exceed 125 degrees. Rising sea levels have also increased the risk of flooding because of storm surges and high tides. These are the foreshocks of climate change.

And we are in for more changes in the future — up to 9 degrees Fahrenheit of average global warming by the end of the century, in the worst-case scenario . For reference, the difference in global average temperatures between now and the peak of the last ice age, when ice sheets covered large parts of North America and Europe, is about 11 degrees Fahrenheit.

Under the Paris Climate Agreement, which President Biden recently rejoined, countries have agreed to try to limit total warming to between 1.5 and 2 degrees Celsius, or 2.7 and 3.6 degrees Fahrenheit, since preindustrial times. And even this narrow range has huge implications . According to scientific studies, the difference between 2.7 and 3.6 degrees Fahrenheit will very likely mean the difference between coral reefs hanging on or going extinct, and between summer sea ice persisting in the Arctic or disappearing completely. It will also determine how many millions of people suffer from water scarcity and crop failures, and how many are driven from their homes by rising seas. In other words, one degree Fahrenheit makes a world of difference.

Earth’s climate has always changed. Hundreds of millions of years ago, the entire planet froze . Fifty million years ago, alligators lived in what we now call the Arctic . And for the last 2.6 million years, the planet has cycled between ice ages when the planet was up to 11 degrees cooler and ice sheets covered much of North America and Europe, and milder interglacial periods like the one we’re in now.

Climate denialists often point to these natural climate changes as a way to cast doubt on the idea that humans are causing climate to change today. However, that argument rests on a logical fallacy. It’s like “seeing a murdered body and concluding that people have died of natural causes in the past, so the murder victim must also have died of natural causes,” a team of social scientists wrote in The Debunking Handbook , which explains the misinformation strategies behind many climate myths.

Indeed, we know that different mechanisms caused the climate to change in the past. Glacial cycles, for example, were triggered by periodic variations in Earth’s orbit , which take place over tens of thousands of years and change how solar energy gets distributed around the globe and across the seasons.

These orbital variations don’t affect the planet’s temperature much on their own. But they set off a cascade of other changes in the climate system; for instance, growing or melting vast Northern Hemisphere ice sheets and altering ocean circulation. These changes, in turn, affect climate by altering the amount of snow and ice, which reflect sunlight, and by changing greenhouse gas concentrations. This is actually part of how we know that greenhouse gases have the ability to significantly affect Earth’s temperature.

For at least the last 800,000 years , atmospheric CO2 concentrations oscillated between about 180 parts per million during ice ages and about 280 p.p.m. during warmer periods, as carbon moved between oceans, forests, soils and the atmosphere. These changes occurred in lock step with global temperatures, and are a major reason the entire planet warmed and cooled during glacial cycles, not just the frozen poles.

Today, however, CO2 levels have soared to 420 p.p.m. — the highest they’ve been in at least three million years . The concentration of CO2 is also increasing about 100 times faster than it did at the end of the last ice age. This suggests something else is going on, and we know what it is: Since the Industrial Revolution, humans have been burning fossil fuels and releasing greenhouse gases that are heating the planet now (see Question 5 for more details on how we know this, and Questions 4 and 8 for how we know that other natural forces aren’t to blame).

Over the next century or two, societies and ecosystems will experience the consequences of this climate change. But our emissions will have even more lasting geologic impacts: According to some studies, greenhouse gas levels may have already warmed the planet enough to delay the onset of the next glacial cycle for at least an additional 50,000 years.

The sun is the ultimate source of energy in Earth’s climate system, so it’s a natural candidate for causing climate change. And solar activity has certainly changed over time. We know from satellite measurements and other astronomical observations that the sun’s output changes on 11-year cycles. Geologic records and sunspot numbers, which astronomers have tracked for centuries, also show long-term variations in the sun’s activity, including some exceptionally quiet periods in the late 1600s and early 1800s.

We know that, from 1900 until the 1950s, solar irradiance increased. And studies suggest that this had a modest effect on early 20th century climate, explaining up to 10 percent of the warming that’s occurred since the late 1800s. However, in the second half of the century, when the most warming occurred, solar activity actually declined . This disparity is one of the main reasons we know that the sun is not the driving force behind climate change.

Another reason we know that solar activity hasn’t caused recent warming is that, if it had, all the layers of the atmosphere should be heating up. Instead, data show that the upper atmosphere has actually cooled in recent decades — a hallmark of greenhouse warming .

So how about volcanoes? Eruptions cool the planet by injecting ash and aerosol particles into the atmosphere that reflect sunlight. We’ve observed this effect in the years following large eruptions. There are also some notable historical examples, like when Iceland’s Laki volcano erupted in 1783, causing widespread crop failures in Europe and beyond, and the “ year without a summer ,” which followed the 1815 eruption of Mount Tambora in Indonesia.

Since volcanoes mainly act as climate coolers, they can’t really explain recent warming. However, scientists say that they may also have contributed slightly to rising temperatures in the early 20th century. That’s because there were several large eruptions in the late 1800s that cooled the planet, followed by a few decades with no major volcanic events when warming caught up. During the second half of the 20th century, though, several big eruptions occurred as the planet was heating up fast. If anything, they temporarily masked some amount of human-caused warming.

The second way volcanoes can impact climate is by emitting carbon dioxide. This is important on time scales of millions of years — it’s what keeps the planet habitable (see Question 5 for more on the greenhouse effect). But by comparison to modern anthropogenic emissions, even big eruptions like Krakatoa and Mount St. Helens are just a drop in the bucket. After all, they last only a few hours or days, while we burn fossil fuels 24-7. Studies suggest that, today, volcanoes account for 1 to 2 percent of total CO2 emissions.

When a big snowstorm hits the United States, climate denialists can try to cite it as proof that climate change isn’t happening. In 2015, Senator James Inhofe, an Oklahoma Republican, famously lobbed a snowball in the Senate as he denounced climate science. But these events don’t actually disprove climate change.

While there have been some memorable storms in recent years, winters are actually warming across the world. In the United States, average temperatures in December, January and February have increased by about 2.5 degrees this century.

On the flip side, record cold days are becoming less common than record warm days. In the United States, record highs now outnumber record lows two-to-one . And ever-smaller areas of the country experience extremely cold winter temperatures . (The same trends are happening globally.)

So what’s with the blizzards? Weather always varies, so it’s no surprise that we still have severe winter storms even as average temperatures rise. However, some studies suggest that climate change may be to blame. One possibility is that rapid Arctic warming has affected atmospheric circulation, including the fast-flowing, high-altitude air that usually swirls over the North Pole (a.k.a. the Polar Vortex ). Some studies suggest that these changes are bringing more frigid temperatures to lower latitudes and causing weather systems to stall , allowing storms to produce more snowfall. This may explain what we’ve experienced in the U.S. over the past few decades, as well as a wintertime cooling trend in Siberia , although exactly how the Arctic affects global weather remains a topic of ongoing scientific debate .

Climate change may also explain the apparent paradox behind some of the other places on Earth that haven’t warmed much. For instance, a splotch of water in the North Atlantic has cooled in recent years, and scientists say they suspect that may be because ocean circulation is slowing as a result of freshwater streaming off a melting Greenland . If this circulation grinds almost to a halt, as it’s done in the geologic past, it would alter weather patterns around the world.

Not all cold weather stems from some counterintuitive consequence of climate change. But it’s a good reminder that Earth’s climate system is complex and chaotic, so the effects of human-caused changes will play out differently in different places. That’s why “global warming” is a bit of an oversimplification. Instead, some scientists have suggested that the phenomenon of human-caused climate change would more aptly be called “ global weirding .”

Extreme weather and natural disasters are part of life on Earth — just ask the dinosaurs. But there is good evidence that climate change has increased the frequency and severity of certain phenomena like heat waves, droughts and floods. Recent research has also allowed scientists to identify the influence of climate change on specific events.

Let’s start with heat waves . Studies show that stretches of abnormally high temperatures now happen about five times more often than they would without climate change, and they last longer, too. Climate models project that, by the 2040s, heat waves will be about 12 times more frequent. And that’s concerning since extreme heat often causes increased hospitalizations and deaths, particularly among older people and those with underlying health conditions. In the summer of 2003, for example, a heat wave caused an estimated 70,000 excess deaths across Europe. (Human-caused warming amplified the death toll .)

Climate change has also exacerbated droughts , primarily by increasing evaporation. Droughts occur naturally because of random climate variability and factors like whether El Niño or La Niña conditions prevail in the tropical Pacific. But some researchers have found evidence that greenhouse warming has been affecting droughts since even before the Dust Bowl . And it continues to do so today. According to one analysis , the drought that afflicted the American Southwest from 2000 to 2018 was almost 50 percent more severe because of climate change. It was the worst drought the region had experienced in more than 1,000 years.

Rising temperatures have also increased the intensity of heavy precipitation events and the flooding that often follows. For example, studies have found that, because warmer air holds more moisture, Hurricane Harvey, which struck Houston in 2017, dropped between 15 and 40 percent more rainfall than it would have without climate change.

It’s still unclear whether climate change is changing the overall frequency of hurricanes, but it is making them stronger . And warming appears to favor certain kinds of weather patterns, like the “ Midwest Water Hose ” events that caused devastating flooding across the Midwest in 2019 .

It’s important to remember that in most natural disasters, there are multiple factors at play. For instance, the 2019 Midwest floods occurred after a recent cold snap had frozen the ground solid, preventing the soil from absorbing rainwater and increasing runoff into the Missouri and Mississippi Rivers. These waterways have also been reshaped by levees and other forms of river engineering, some of which failed in the floods.

Wildfires are another phenomenon with multiple causes. In many places, fire risk has increased because humans have aggressively fought natural fires and prevented Indigenous peoples from carrying out traditional burning practices. This has allowed fuel to accumulate that makes current fires worse .

However, climate change still plays a major role by heating and drying forests, turning them into tinderboxes. Studies show that warming is the driving factor behind the recent increases in wildfires; one analysis found that climate change is responsible for doubling the area burned across the American West between 1984 and 2015. And researchers say that warming will only make fires bigger and more dangerous in the future.

It depends on how aggressively we act to address climate change. If we continue with business as usual, by the end of the century, it will be too hot to go outside during heat waves in the Middle East and South Asia . Droughts will grip Central America, the Mediterranean and southern Africa. And many island nations and low-lying areas, from Texas to Bangladesh, will be overtaken by rising seas. Conversely, climate change could bring welcome warming and extended growing seasons to the upper Midwest , Canada, the Nordic countries and Russia . Farther north, however, the loss of snow, ice and permafrost will upend the traditions of Indigenous peoples and threaten infrastructure.

It’s complicated, but the underlying message is simple: unchecked climate change will likely exacerbate existing inequalities . At a national level, poorer countries will be hit hardest, even though they have historically emitted only a fraction of the greenhouse gases that cause warming. That’s because many less developed countries tend to be in tropical regions where additional warming will make the climate increasingly intolerable for humans and crops. These nations also often have greater vulnerabilities, like large coastal populations and people living in improvised housing that is easily damaged in storms. And they have fewer resources to adapt, which will require expensive measures like redesigning cities, engineering coastlines and changing how people grow food.

Already, between 1961 and 2000, climate change appears to have harmed the economies of the poorest countries while boosting the fortunes of the wealthiest nations that have done the most to cause the problem, making the global wealth gap 25 percent bigger than it would otherwise have been. Similarly, the Global Climate Risk Index found that lower income countries — like Myanmar, Haiti and Nepal — rank high on the list of nations most affected by extreme weather between 1999 and 2018. Climate change has also contributed to increased human migration, which is expected to increase significantly .

Even within wealthy countries, the poor and marginalized will suffer the most. People with more resources have greater buffers, like air-conditioners to keep their houses cool during dangerous heat waves, and the means to pay the resulting energy bills. They also have an easier time evacuating their homes before disasters, and recovering afterward. Lower income people have fewer of these advantages, and they are also more likely to live in hotter neighborhoods and work outdoors, where they face the brunt of climate change.

These inequalities will play out on an individual, community, and regional level. A 2017 analysis of the U.S. found that, under business as usual, the poorest one-third of counties, which are concentrated in the South, will experience damages totaling as much as 20 percent of gross domestic product, while others, mostly in the northern part of the country, will see modest economic gains. Solomon Hsiang, an economist at University of California, Berkeley, and the lead author of the study, has said that climate change “may result in the largest transfer of wealth from the poor to the rich in the country’s history.”

Even the climate “winners” will not be immune from all climate impacts, though. Desirable locations will face an influx of migrants. And as the coronavirus pandemic has demonstrated, disasters in one place quickly ripple across our globalized economy. For instance, scientists expect climate change to increase the odds of multiple crop failures occurring at the same time in different places, throwing the world into a food crisis .

On top of that, warmer weather is aiding the spread of infectious diseases and the vectors that transmit them, like ticks and mosquitoes . Research has also identified troubling correlations between rising temperatures and increased interpersonal violence , and climate change is widely recognized as a “threat multiplier” that increases the odds of larger conflicts within and between countries. In other words, climate change will bring many changes that no amount of money can stop. What could help is taking action to limit warming.

One of the most common arguments against taking aggressive action to combat climate change is that doing so will kill jobs and cripple the economy. But this implies that there’s an alternative in which we pay nothing for climate change. And unfortunately, there isn’t. In reality, not tackling climate change will cost a lot , and cause enormous human suffering and ecological damage, while transitioning to a greener economy would benefit many people and ecosystems around the world.

Let’s start with how much it will cost to address climate change. To keep warming well below 2 degrees Celsius, the goal of the Paris Climate Agreement, society will have to reach net zero greenhouse gas emissions by the middle of this century. That will require significant investments in things like renewable energy, electric cars and charging infrastructure, not to mention efforts to adapt to hotter temperatures, rising sea-levels and other unavoidable effects of current climate changes. And we’ll have to make changes fast.

Estimates of the cost vary widely. One recent study found that keeping warming to 2 degrees Celsius would require a total investment of between $4 trillion and $60 trillion, with a median estimate of $16 trillion, while keeping warming to 1.5 degrees Celsius could cost between $10 trillion and $100 trillion, with a median estimate of $30 trillion. (For reference, the entire world economy was about $88 trillion in 2019.) Other studies have found that reaching net zero will require annual investments ranging from less than 1.5 percent of global gross domestic product to as much as 4 percent . That’s a lot, but within the range of historical energy investments in countries like the U.S.

Now, let’s consider the costs of unchecked climate change, which will fall hardest on the most vulnerable. These include damage to property and infrastructure from sea-level rise and extreme weather, death and sickness linked to natural disasters, pollution and infectious disease, reduced agricultural yields and lost labor productivity because of rising temperatures, decreased water availability and increased energy costs, and species extinction and habitat destruction. Dr. Hsiang, the U.C. Berkeley economist, describes it as “death by a thousand cuts.”

As a result, climate damages are hard to quantify. Moody’s Analytics estimates that even 2 degrees Celsius of warming will cost the world $69 trillion by 2100, and economists expect the toll to keep rising with the temperature. In a recent survey , economists estimated the cost would equal 5 percent of global G.D.P. at 3 degrees Celsius of warming (our trajectory under current policies) and 10 percent for 5 degrees Celsius. Other research indicates that, if current warming trends continue, global G.D.P. per capita will decrease between 7 percent and 23 percent by the end of the century — an economic blow equivalent to multiple coronavirus pandemics every year. And some fear these are vast underestimates .

Already, studies suggest that climate change has slashed incomes in the poorest countries by as much as 30 percent and reduced global agricultural productivity by 21 percent since 1961. Extreme weather events have also racked up a large bill. In 2020, in the United States alone, climate-related disasters like hurricanes, droughts, and wildfires caused nearly $100 billion in damages to businesses, property and infrastructure, compared to an average of $18 billion per year in the 1980s.

Given the steep price of inaction, many economists say that addressing climate change is a better deal . It’s like that old saying: an ounce of prevention is worth a pound of cure. In this case, limiting warming will greatly reduce future damage and inequality caused by climate change. It will also produce so-called co-benefits, like saving one million lives every year by reducing air pollution, and millions more from eating healthier, climate-friendly diets. Some studies even find that meeting the Paris Agreement goals could create jobs and increase global G.D.P . And, of course, reining in climate change will spare many species and ecosystems upon which humans depend — and which many people believe to have their own innate value.

The challenge is that we need to reduce emissions now to avoid damages later, which requires big investments over the next few decades. And the longer we delay, the more we will pay to meet the Paris goals. One recent analysis found that reaching net-zero by 2050 would cost the U.S. almost twice as much if we waited until 2030 instead of acting now. But even if we miss the Paris target, the economics still make a strong case for climate action, because every additional degree of warming will cost us more — in dollars, and in lives.

Veronica Penney contributed reporting.

Illustration photographs by Esther Horvath, Max Whittaker, David Maurice Smith and Talia Herman for The New York Times; Esther Horvath/Alfred-Wegener-Institut

An earlier version of this article misidentified the authors of The Debunking Handbook. It was written by social scientists who study climate communication, not a team of climate scientists.

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6.4 Annotated Student Sample: “Slowing Climate Change” by Shawn Krukowski

Learning outcomes.

By the end of this section, you will be able to:

• Identify the features common to proposals.
• Analyze the organizational structure of a proposal and how writers develop ideas.
• Articulate how writers use and cite evidence to build credibility.
• Identify sources of evidence within a text and in source citations.

Introduction

The proposal that follows was written by student Shawn Krukowski for a first-year composition course. Shawn’s assignment was to research a contemporary problem and propose one or more solutions. Deeply concerned about climate change, Shawn chose to research ways to slow the process. In his proposal, he recommends two solutions he thinks are most promising.

Living by Their Own Words

A call to action.

student sample text The earth’s climate is changing. Although the climate has been changing slowly for the past 22,000 years, the rate of change has increased dramatically. Previously, natural climate changes occurred gradually, sometimes extending over thousands of years. Since the mid-20th century, however, climate change has accelerated exponentially, a result primarily of human activities, and is reaching a crisis level. end student sample text

student sample text Critical as it is, however, climate change can be controlled. Thanks to current knowledge of science and existing technologies, it is possible to respond effectively. Although many concerned citizens, companies, and organizations in the private sector are taking action in their own spheres, other individuals, corporations, and organizations are ignoring, or even denying, the problem. What is needed to slow climate change is unified action in two key areas—mitigation and adaptation—spurred by government leadership in the United States and a global commitment to addressing the problem immediately. end student sample text

annotated text Introduction. The proposal opens with an overview of the problem and pivots to the solution in the second paragraph. end annotated text

annotated text Thesis Statement. The thesis statement in last sentence of the introduction previews the organization of the proposal and the recommended solutions. end annotated text

Problem: Negative Effects of Climate Change

annotated text Heading. Centered, boldface headings mark major sections of the proposal. end annotated text

annotated text Body. The three paragraphs under this heading discuss the problem. end annotated text

annotated text Topic Sentence. The paragraph opens with a sentence stating the topics developed in the following paragraphs. end annotated text

student sample text For the 4,000 years leading up to the Industrial Revolution, global temperatures remained relatively constant, with a few dips of less than 1°C. Previous climate change occurred so gradually that life forms were able to adapt to it. Some species became extinct, but others survived and thrived. In just the past 100 years, however, temperatures have risen by approximately the same amount that they rose over the previous 4,000 years. end student sample text

annotated text Audience. Without knowing for sure the extent of readers’ knowledge of climate change, the writer provides background for them to understand the problem. end annotated text

student sample text The rapid increase in temperature has a negative global impact. First, as temperatures rise, glaciers and polar ice are melting at a faster rate; in fact, by the middle of this century, the Arctic Ocean is projected to be ice-free in summer. As a result, global sea levels are projected to rise from two to four feet by 2100 (U.S. Global Change Research Program [USGCRP], 2014a). If this rise actually does happen, many coastal ecosystems and human communities will disappear. end student sample text

annotated text Discussion of the Problem. The first main point of the problem is discussed in this paragraph. end annotated text

annotated text Statistics as Evidence. The writer provides specific numbers and cites the source in APA style. end annotated text

annotated text Transitions . The writer uses transitions here (first, as a result , and second in the next paragraph) and elsewhere to make connections between ideas and to enable readers to follow them more easily. At the same time, the transitions give the proposal coherence. end annotated text

student sample text Second, weather of all types is becoming more extreme: heat waves are hotter, cold snaps are colder, and precipitation patterns are changing, causing longer droughts and increased flooding. Oceans are becoming more acidic as they increase their absorption of carbon dioxide. This change affects coral reefs and other marine life. Since the 1980s, hurricanes have increased in frequency, intensity, and duration. As shown in Figure 6.5, the 2020 hurricane season was the most active on record, with 30 named storms, a recording-breaking 11 storms hitting the U.S. coastline (compared to 9 in 1916), and 10 named storms in September—the highest monthly number on record. Together, these storms caused more than $40 billion in damage. Not only was this the fifth consecutive above-normal hurricane season, it was preceded by four consecutive above-normal years in 1998 to 2001 (National Oceanic and Atmospheric Administration, 2020). end student sample text

annotated text Discussion of the Problem. The second main point of the problem is discussed in this paragraph. end annotated text

annotated text Visual as Evidence. The writer refers to “Figure 6.4” in the text and places the figure below the paragraph. end annotated text

annotated text Source Citation in APA Style: Visual. The writer gives the figure a number, a title, an explanatory note, and a source citation. The source is also cited in the list of references. end annotated text

Solutions: Mitigation and Adaptation

annotated text Heading. The centered, boldface heading marks the start of the solutions section of the proposal. end annotated text

annotated text Body. The eight paragraphs under this heading discuss the solutions given in the thesis statement. end annotated text

student sample text To control the effects of climate change, immediate action in two key ways is needed: mitigation and adaptation. Mitigating climate change by reducing and stabilizing the carbon emissions that produce greenhouse gases is the only long-term way to avoid a disastrous future. In addition, adaptation is imperative to allow ecosystems, food systems, and development to become more sustainable. end student sample text

student sample text Mitigation and adaptation will not happen on their own; action on such a vast scale will require governments around the globe to take initiatives. The United States needs to cooperate with other nations and assume a leadership role in fighting climate change. end student sample text

annotated text Objective Stance. The writer presents evidence (facts, statistics, and examples) in neutral, unemotional language, which builds credibility, or ethos, with readers. end annotated text

annotated text Heading. The flush-left, boldface heading marks the first subsection of the solutions. end annotated text

annotated text Topic Sentence. The paragraph opens with a sentence stating the solution developed in the following paragraphs. end annotated text

student sample text The first challenge is to reduce the flow of greenhouse gases into the atmosphere. The Union of Concerned Scientists (2020) warns that “net zero” carbon emissions—meaning that no more carbon enters the atmosphere than is removed—needs to be reached by 2050 or sooner. As shown in Figure 6.6, reducing carbon emissions will require a massive effort, given the skyrocketing rate of increase of greenhouse gases since 1900 (USGCRP, 2014b). end student sample text

annotated text Synthesis. In this paragraph, the writer synthesizes factual evidence from two sources and cites them in APA style. end annotated text

annotated text Visual as Evidence. The writer refers to “Figure 6.5” in the text and places the figure below the paragraph. end annotated text

student sample text Significant national policy changes must be made and must include multiple approaches; here are two areas of concern: end student sample text

annotated text Presentation of Solutions. For clarity, the writer numbers the two items to be discussed. end annotated text

student sample text 1. Transportation systems. In the United States in 2018, more than one-quarter—28.2 percent—of emissions resulted from the consumption of fossil fuels for transportation. More than half of these emissions came from passenger cars, light-duty trucks, sport utility vehicles, and minivans (U.S. Environmental Protection Agency [EPA], 2020). Priorities for mitigation should include using fuels that emit less carbon; improving fuel efficiency; and reducing the need for travel through urban planning, telecommuting and videoconferencing, and biking and pedestrian initiatives. end student sample text

annotated text Source Citation in APA Style: Group Author. The parenthetical citation gives the group’s name, an abbreviation to be used in subsequent citations, and the year of publication. end annotated text

student sample text Curtailing travel has a demonstrable effect. Scientists have recorded a dramatic drop in emissions during government-imposed travel and business restrictions in 2020. Intended to slow the spread of COVID-19, these restrictions also decreased air pollution significantly. For example, during the first six weeks of restrictions in the San Francisco Bay area, traffic was reduced by about 45 percent, and emissions were roughly a quarter lower than the previous six weeks. Similar findings were observed around the globe, with reductions of up to 80 percent (Bourzac, 2020). end student sample text

annotated text Source Citation in APA Style: One Author. The parenthetical citation gives the author’s name and the year of publication. end annotated text

student sample text 2. Energy production. The second-largest source of emissions is the use of fossil fuels to produce energy, primarily electricity, which accounted for 26.9 percent of U.S. emissions (EPA, 2020). Fossil fuels can be replaced by solar, wind, hydro, and geothermal sources. Solar voltaic systems have the potential to become the least expensive energy in the world (Green America, 2020). Solar sources should be complemented by wind power, which tends to increase at night when the sun is absent. According to the Copenhagen Consensus, the most effective way to combat climate change is to increase investment in green research and development (Lomborg, 2020). Notable are successes in the countries of Morocco and The Gambia, both of which have committed to investing in national programs to limit emissions primarily by generating electricity from renewable sources (Mulvaney, 2019). end student sample text

annotated text Synthesis. The writer develops the paragraph by synthesizing evidence from four sources and cites them in APA style. end annotated text

student sample text A second way to move toward net zero is to actively remove carbon dioxide from the atmosphere. Forests and oceans are so-called “sinks” that collect and store carbon (EPA, 2020). Tropical forests that once made up 12 percent of global land masses now cover only 5 percent, and the loss of these tropical forest sinks has caused 16 to 19 percent of greenhouse gas emissions (Green America, 2020). Worldwide reforestation is vital and demands both commitment and funding on a global scale. New technologies also allow “direct air capture,” which filers carbon from the air, and “carbon capture,” which prevents it from leaving smokestacks. end student sample text

student sample text All of these technologies should be governmentally supported and even mandated, where appropriate. end student sample text

annotated text Synthesis. The writer develops the paragraph by synthesizing evidence from two sources and cites them in APA style. end annotated text

annotated text Heading. The flush-left, boldface heading marks the second subsection of the solutions. end annotated text

student sample text Historically, civilizations have adapted to climate changes, sometimes successfully, sometimes not. Our modern civilization is largely the result of climate stability over the past 12,000 years. However, as the climate changes, humans must learn to adapt on a national, community, and individual level in many areas. While each country sets its own laws and regulations, certain principles apply worldwide. end student sample text

student sample text 1. Infrastructure. Buildings—residential, commercial, and industrial—produce about 33 percent of greenhouse gas emissions worldwide (Biello, 2007). Stricter standards for new construction, plus incentives for investing in insulation and other improvements to existing structures, are needed. Development in high-risk areas needs to be discouraged. Improved roads and transportation systems would help reduce fuel use. Incentives for decreasing energy consumption are needed to reduce rising demands for power. end student sample text

student sample text 2. Food waste. More than 30 percent of the food produced in the United States is never consumed, and food waste causes 44 gigatons of carbon emissions a year (Green America, 2020). In a landfill, the nutrients in wasted food never return to the soil; instead, methane, a greenhouse gas, is produced. High-income countries such as the United States need to address wasteful processing and distribution systems. Low-income countries, on the other hand, need an infrastructure that supports proper food storage and handling. Educating consumers also must be a priority. end student sample text

annotated text Source Citation in APA Style: Group Author. The parenthetical citation gives the group’s name and the year of publication. end annotated text

student sample text 3. Consumerism. People living in consumer nations have become accustomed to abundance. Many purchases are nonessential yet consume fossil fuels to manufacture, package, market, and ship products. During World War II, the U.S. government promoted the slogan “Use It Up, Wear It Out, Make It Do, or Do Without.” This attitude was widely accepted because people recognized a common purpose in the war effort. A similar shift in mindset is needed today. end student sample text

student sample text Adaptation is not only possible but also economically advantageous. One case study is Walmart, which is the world’s largest company by revenue. According to Dearn (2020), the company announced a plan to reduce its global emissions to zero by 2040. Among the goals is powering its facilities with 100 percent renewable energy and using electric vehicles with zero emissions. As of 2020, about 29 percent of its energy is from renewable sources. Although the 2040 goal applies to Walmart facilities only, plans are underway to reduce indirect emissions, such as those from its supply chain. According to CEO Doug McMillon, the company’s commitment is to “becoming a regenerative company—one that works to restore, renew and replenish in addition to preserving our planet, and encourages others to do the same” (Dearn, 2020). In addition to encouraging other corporations, these goals present a challenge to the government to take action on climate change. end student sample text

annotated text Extended Example as Evidence. The writer indicates where borrowed information from the source begins and ends, and cites the source in APA style. end annotated text

annotated text Source Citation in APA Style: One Author. The parenthetical citation gives only the year of publication because the author’s name is cited in the sentence. end annotated text

Objections to Taking Action

annotated text Heading. The centered, boldface heading marks the start of the writer’s discussion of potential objections to the proposed solutions. end annotated text

annotated text Body. The writer devotes two paragraphs to objections. end annotated text

student sample text Despite scientific evidence, some people and groups deny that climate change is real or, if they admit it exists, insist it is not a valid concern. Those who think climate change is not a problem point to Earth’s millennia-long history of changing climate as evidence that life has always persisted. However, their claims do not consider the difference between “then” and “now.” Most of the change predates human civilization, which has benefited from thousands of years of stable climate. The rapid change since the Industrial Revolution is unprecedented in human history. end student sample text

student sample text Those who deny climate change or its dangers seek primarily to relax or remove pollution standards and regulations in order to protect, or maximize profit from, their industries. To date, their lobbying has been successful. For example, the world’s fossil-fuel industry received $5.3 trillion in 2015 alone, while the U.S. wind-energy industry received $12.3 billion in subsidies between 2000 and 2020 (Green America, 2020). end student sample text

Conclusion and Recommendation

annotated text Heading. The centered, boldface heading marks the start of the conclusion and recommendation. end annotated text

annotated text Conclusion and Recommendation. The proposal concludes with a restatement of the proposed solutions and a call to action. end annotated text

student sample text Greenhouse gases can be reduced to acceptable levels; the technology already exists. But that technology cannot function without strong governmental policies prioritizing the environment, coupled with serious investment in research and development of climate-friendly technologies. end student sample text

student sample text The United States government must place its full support behind efforts to reduce greenhouse gasses and mitigate climate change. Rejoining the Paris Agreement is a good first step, but it is not enough. Citizens must demand that their elected officials at the local, state, and national levels accept responsibility to take action on both mitigation and adaptation. Without full governmental support, good intentions fall short of reaching net-zero emissions and cannot achieve the adaptation in attitude and lifestyle necessary for public compliance. There is no alternative to accepting this reality. Addressing climate change is too important to remain optional. end student sample text

Biello, D. (2007, May 25). Combatting climate change: Farming out global warming solutions. Scientific American. https://www.scientificamerican.com/article/combating-climate-change-farming-forestry/

Bourzac, K. (2020, September 25). COVID-19 lockdowns had strange effects on air pollution across the globe. Chemical & Engineering News. https://cen.acs.org/environment/atmospheric-chemistry/COVID-19-lockdowns-had-strange-effects-on-air-pollution-across-the-globe/98/i37

Dearn, G. (2020, September 21). Walmart said it will eliminate its carbon footprint by 2040 — but not for its supply chain, which makes up the bulk of its emissions. Business Insider. https://www.businessinsider.com/walmart-targets-zero-carbon-emissions-2040-not-suppliers-2020-9

Green America (2020). Top 10 solutions to reverse climate change. https://www.greenamerica.org/climate-change-100-reasons-hope/top-10-solutions-reverse-climate-change.

Lomborg, B. (2020, July 17). The alarm about climate change is blinding us to sensible solutions. The Globe and Mail. https://www.theglobeandmail.com/opinion/article-the-alarm-about-climate-change-is-blinding-us-to-sensible-solutions/

Mulvaney, K. (2019, September 19). Climate change report card: These countries are reaching targets. National Geographic . https://www.nationalgeographic.com/environment/2019/09/climate-change-report-card-co2-emissions/

National Oceanic and Atmospheric Administration (2020, November 24). Record-breaking Atlantic hurricane season draws to an end. https://www.noaa.gov/media-release/record-breaking-atlantic-hurricane-season-draws-to-end

Union of Concerned Scientists (2020). Climate solutions. https://www.ucsusa.org/climate/solutions

U.S. Environmental Protection Agency (2020). Sources of greenhouse gas emissions. Greenhouse Gas Emissions. https://www.epa.gov/ghgemissions/sources-greenhouse-gas-emissions

U.S. Global Change Research Program (2014a). Melting ice. National Climate Assessment. https://nca2014.globalchange.gov/report/our-changing-climate/melting-ice

U.S. Global Change Research Program (2014b). Our changing climate. National Climate Assessment. https://nca2014.globalchange.gov/highlights/report-findings/our-changing-climate#tab1-images

annotated text References Page in APA Style. All sources cited in the text of the report—and only those sources—are listed in alphabetical order with full publication information. See the Handbook for more on APA documentation style. end annotated text

The following link takes you to another model of an annotated sample paper on solutions to animal testing posted by the University of Arizona’s Global Campus Writing Center.

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Climate Change: Causes and Effects

Last updated on April 2, 2024 by ClearIAS Team

India ranks fifth globally in terms of climate change vulnerability. Due to climate change, India suffered losses of almost 37 billion dollars in 2018 (almost twice what it lost between 1998-2017).

According to MIT, 78 out of India’s 89 urban regions will experience a considerable increase in flash floods if preindustrial temperatures are increased by 2° Celsius.

Sea level rise and stronger cyclones have already been brought on by an increase in sea surface temperature.

Table of Contents

What Is Climate Change?

Climate change means a long-term shift in temperature and weather patterns that may be natural such as through variations in the solar cycle or a result of anthropogenic activities such as carbon emission.

• Since the 1800s, human activities, primarily the combustion of fossil fuels like coal, oil, and gas have been the primary cause of climate change.
• Fossil fuel combustion produces greenhouse gas emissions that serve as a blanket around the earth, trapping heat from the sun and increasing temperatures.
• Carbon dioxide and methane are two prominent greenhouse gas emissions that are contributing to climate change. These are produced, for instance, by burning coal or gasoline.
• Carbon dioxide can also be released during forest and land clearing and Methane is emitted primarily by waste landfills. Among all, the major emitters are energy, industry, transportation, buildings, agriculture, and land use.

Key Findings Related to Climate

• China is the largest emitter of carbon dioxide which comprises 30.60% of the CO2 emission worldwide. China is followed by the USA and India.
• The Earth is now about 1.1°C warmer than it was in the 1800s. The commitment made under the Paris Agreement may not be met.
• By the end of the century, the temperature might rise by as much as 4.4°C if carbon dioxide emissions continue on their current course.
• The levels of greenhouse gases rose to a new height in 2019. The amount of carbon dioxide was 148% of preindustrial levels.
• While sea ice, the Greenland ice sheet, and glaciers have decreased over the same period and permafrost temperatures have climbed, the Arctic has warmed at least twice as fast as the global average.
• Between 2020 and 2030, the world’s production of fossil fuels must drop by around 6% to maintain a 1.5°C trajectory.

Also read:  Planetary Boundaries

Causes of Climate Change

Several anthropogenic activities induce harm to the environment. A few important of them are-

Power Generation

• Burning fossil fuels to provide power and heat accounts for a sizable portion of world emissions. Burning coal, oil, or gas releases carbon dioxide and nitrous oxide, which are still used to produce the majority of power.
• Only a little over a quarter of the world’s electricity is generated by renewable energy sources including wind, solar, and other natural resources.

Manufacturing and Industrial goods

• The manufacturing/industrial sector is one of the leading global producers of greenhouse gas emissions.
• Emissions from manufacturing and industry are mostly the result of burning fossil fuels to create energy for the production of items like textiles, electronics, plastics, cement, iron, and steel.
• Gases are also released during mining and other industrial activities, as well as during construction.
• Some products are also manufactured from chemicals derived from fossil fuels i.e., plastic products.

Deforestation

• A per cent of the world’s greenhouse gas emissions is caused by deforestation, along with agriculture and other changes in land use.
• As per an estimation, nearly 12 million hectares of forests are burned annually. Cutting down forests to make way for farms, pastures, or for other purposes also increases emissions.
• Forests absorb carbon dioxide, hence cutting or destroying forests reduces nature’s capacity to absorb emissions.

Transportation

• Fossil fuels are typically used to power transportation machines. As a result, emissions of greenhouse gases, particularly carbon dioxide, are greatly influenced by the transportation sector.
• In addition, statistics suggest that over the next few years, energy use for transportation will rise significantly.

Food Production

• In addition to deforestation and clearing land for agriculture and grazing, digestion by cows and sheep, production and use of fertilizers and manure, and the use of energy to run farm machinery or fishing boats, typically with fossil fuels, all contribute to the production of food.

Powering Buildings

• Over half of all electricity used worldwide is consumed by residential and commercial structures.
• Energy-related carbon dioxide emissions from buildings have increased over the past few years as a result of rising energy demand for heating and cooling, rising air conditioner ownership, and increased electricity use for lighting, appliances, and connected devices.

Also read: State of Global Climate Report 2023

Effects of Climate Change

Climate change has devastating impacts on us and the environment. The major effects are-

Increase in Temperature

• The global surface temperature rises together with greenhouse gas concentrations. The most recent ten years, 2011 to 2020, have been the warmest on record.
• Higher temperatures worsen heat-related illnesses and make it more challenging to work outside. When the weather is hotter, wildfires start more easily and spread more quickly.

More Severe Storms

• In many areas, destructive storms have increased in intensity and frequency. More moisture evaporates as temperatures rise , aggravating extremely heavy rains and flooding and resulting in more severe storms.
• The warming ocean has an impact on both the intensity and frequency of tropical storms. Warm ocean surface waters are the primary source of cyclones, hurricanes, and typhoons.

Frequent Drought

• Water availability is changing due to climate change, becoming more scarce in many places. In already water-stressed areas, global warming makes water shortages worse.
• It also increases the danger of ecological and agricultural droughts, which can harm crops and make ecosystems more vulnerable.

Warming and Rising Ocean

• The ocean absorbs carbon dioxide, keeping it out of the atmosphere. However, additional carbon dioxide causes the water to become more acidic, endangering coral reefs and marine life.
• It is the property of water that it expands when becomes warmer, therefore as the ocean warms, its volume will rise. Sea levels increase as a result of ice sheet melting, endangering coastal and island communities.

Loss of Species

• Both animals on land and in the ocean are at risk from climate change. As the temperatures rise, these risks rise as well.
• The rate of extinction on the planet is 1,000 times higher now than it has ever been in recorded human history. Within the next few decades, one million species face extinction .
• Threats from climate change include invasive pests and illnesses, forest fires, and harsh weather.

Food Scarcity

• Global hunger and poor nutrition are on the rise for a variety of reasons, including climate change and an increase in extreme weather occurrences. Crops, animals, and fisheries might all be lost or become less effective.
• Marine resources that provide food for billions of people are in danger as a result of the ocean’s increasing acidity.
• Food sources from herding, hunting, and fishing have been hampered in several Arctic regions due to changes in the snow and ice cover.
• Heat stress can reduce available water and grazing areas, which can lower crop output and have an impact on cattle.

Health Hazards

• The single greatest hazard to human health is climate change. Air pollution, sickness, harsh weather, forced relocation, stress on mental health, increasing hunger and inadequate nutrition in areas where people cannot grow or get enough food are only a few of the health effects of climate change.
• 13 million individuals every year are killed by environmental conditions. Extreme weather events increase fatalities and make it challenging for healthcare systems to keep up with the growing number of diseases caused by changing weather patterns.

Read:  Climate Resilient Health Systems;   Climate Change and Health

Deepen Poverty and Displacement

• Climate change makes it easier for people to fall into and stay in poverty.
• Floods have the potential to devastate homes and livelihoods in urban slums. Outdoor jobs may be challenging to perform in the heat. Crops may be impacted by water scarcity.
• Weather-related disasters have uprooted an estimated 23.1 million people annually on average over the previous ten years (2010-2019), leaving millions more at risk of poverty.
• The majority of refugees are from countries that are least able and prepared to adjust to the effects of climate change.

Read:  Impact of climate change on Indian monsoon

Every increase in global warming matters

Numerous UN assessments were endorsed by hundreds of experts and government reviewers who concluded that keeping the increase in global temperature to 1.5°C will help us escape the worst climatic effects and maintain a habitable climate.

However, according to current national climate plans, the average global warming by the end of the century will reach about 3.2°C.

Across the world, emissions that contribute to climate change are produced, yet some countries produce significantly more than others. 3 per cent of global emissions are produced by the 100 countries with the lowest emissions.

68% of the contribution comes from the ten countries with the highest emissions. Everyone must act to combat climate change, but those who contribute most to the issue must be the countries with a larger obligation to do so first.

Read:  Black carbon emissions

Article Written By: Priti Raj

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Essay on Global Warming

• Updated on  
• Apr 27, 2024

Being able to write an essay is an integral part of mastering any language. Essays form an integral part of many academic and scholastic exams like the SAT , and UPSC amongst many others. It is a crucial evaluative part of English proficiency tests as well like IELTS , TOEFL , etc. Major essays are meant to emphasize public issues of concern that can have significant consequences on the world. To understand the concept of Global Warming and its causes and effects, we must first examine the many factors that influence the planet’s temperature and what this implies for the world’s future. Here’s an unbiased look at the essay on Global Warming and other essential related topics.

Short Essay on Global Warming and Climate Change?

Since the industrial and scientific revolutions, Earth’s resources have been gradually depleted. Furthermore, the start of the world’s population’s exponential expansion is particularly hard on the environment. Simply put, as the population’s need for consumption grows, so does the use of natural resources , as well as the waste generated by that consumption.

Climate change has been one of the most significant long-term consequences of this. Climate change is more than just the rise or fall of global temperatures; it also affects rain cycles, wind patterns, cyclone frequencies, sea levels, and other factors. It has an impact on all major life groupings on the planet.

Also Read: World Population Day

What is Global Warming?

Global warming is the unusually rapid increase in Earth’s average surface temperature over the past century, primarily due to the greenhouse gases released by people burning fossil fuels . The greenhouse gases consist of methane, nitrous oxide, ozone, carbon dioxide, water vapour, and chlorofluorocarbons. The weather prediction has been becoming more complex with every passing year, with seasons more indistinguishable, and the general temperatures hotter.

The number of hurricanes, cyclones, droughts, floods, etc., has risen steadily since the onset of the 21st century. The supervillain behind all these changes is Global Warming. The name is quite self-explanatory; it means the rise in the temperature of the Earth.

Also Read: What is a Natural Disaster?

What are the Causes of Global Warming?

According to recent studies, many scientists believe the following are the primary four causes of global warming:

• Deforestation 
• Greenhouse emissions
• Carbon emissions per capita

Extreme global warming is causing natural disasters , which can be seen all around us. One of the causes of global warming is the extreme release of greenhouse gases that become trapped on the earth’s surface, causing the temperature to rise. Similarly, volcanoes contribute to global warming by spewing excessive CO2 into the atmosphere.

The increase in population is one of the major causes of Global Warming. This increase in population also leads to increased air pollution . Automobiles emit a lot of CO2, which remains in the atmosphere. This increase in population is also causing deforestation, which contributes to global warming.

The earth’s surface emits energy into the atmosphere in the form of heat, keeping the balance with the incoming energy. Global warming depletes the ozone layer, bringing about the end of the world. There is a clear indication that increased global warming will result in the extinction of all life on Earth’s surface.

Also Read: Land, Soil, Water, Natural Vegetation, and Wildlife Resources

Solutions for Global Warming

Of course, industries and multinational conglomerates emit more carbon than the average citizen. Nonetheless, activism and community effort are the only viable ways to slow the worsening effects of global warming. Furthermore, at the state or government level, world leaders must develop concrete plans and step-by-step programmes to ensure that no further harm is done to the environment in general.

Although we are almost too late to slow the rate of global warming, finding the right solution is critical. Everyone, from individuals to governments, must work together to find a solution to Global Warming. Some of the factors to consider are pollution control, population growth, and the use of natural resources.

One very important contribution you can make is to reduce your use of plastic. Plastic is the primary cause of global warming, and recycling it takes years. Another factor to consider is deforestation, which will aid in the control of global warming. More tree planting should be encouraged to green the environment. Certain rules should also govern industrialization. Building industries in green zones that affect plants and species should be prohibited.

Also Read: Essay on Pollution

Effects of Global Warming

Global warming is a real problem that many people want to disprove to gain political advantage. However, as global citizens, we must ensure that only the truth is presented in the media.

This decade has seen a significant impact from global warming. The two most common phenomena observed are glacier retreat and arctic shrinkage. Glaciers are rapidly melting. These are clear manifestations of climate change.

Another significant effect of global warming is the rise in sea level. Flooding is occurring in low-lying areas as a result of sea-level rise. Many countries have experienced extreme weather conditions. Every year, we have unusually heavy rain, extreme heat and cold, wildfires, and other natural disasters.

Similarly, as global warming continues, marine life is being severely impacted. This is causing the extinction of marine species as well as other problems. Furthermore, changes are expected in coral reefs, which will face extinction in the coming years. These effects will intensify in the coming years, effectively halting species expansion. Furthermore, humans will eventually feel the negative effects of Global Warming.

Also Read: Concept of Sustainable Development

Sample Essays on Global Warming

Here are some sample essays on Global Warming:

Essay on Global Warming Paragraph in 100 – 150 words

Global Warming is caused by the increase of carbon dioxide levels in the earth’s atmosphere and is a result of human activities that have been causing harm to our environment for the past few centuries now. Global Warming is something that can’t be ignored and steps have to be taken to tackle the situation globally. The average temperature is constantly rising by 1.5 degrees Celsius over the last few years.

The best method to prevent future damage to the earth, cutting down more forests should be banned and Afforestation should be encouraged. Start by planting trees near your homes and offices, participate in events, and teach the importance of planting trees. It is impossible to undo the damage but it is possible to stop further harm.

Also Read: Social Forestry

Essay on Global Warming in 250 Words

Over a long period, it is observed that the temperature of the earth is increasing. This affected wildlife, animals, humans, and every living organism on earth. Glaciers have been melting, and many countries have started water shortages, flooding, and erosion and all this is because of global warming. 

No one can be blamed for global warming except for humans. Human activities such as gases released from power plants, transportation, and deforestation have increased gases such as carbon dioxide, CFCs, and other pollutants in the earth’s atmosphere.                                              The main question is how can we control the current situation and build a better world for future generations. It starts with little steps by every individual. 

Start using cloth bags made from sustainable materials for all shopping purposes, instead of using high-watt lights use energy-efficient bulbs, switch off the electricity, don’t waste water, abolish deforestation and encourage planting more trees. Shift the use of energy from petroleum or other fossil fuels to wind and solar energy. Instead of throwing out the old clothes donate them to someone so that it is recycled. 

Donate old books, don’t waste paper.  Above all, spread awareness about global warming. Every little thing a person does towards saving the earth will contribute in big or small amounts. We must learn that 1% effort is better than no effort. Pledge to take care of Mother Nature and speak up about global warming.

Also Read: Types of Water Pollution

Essay on Global Warming in 500 Words

Global warming isn’t a prediction, it is happening! A person denying it or unaware of it is in the most simple terms complicit. Do we have another planet to live on? Unfortunately, we have been bestowed with this one planet only that can sustain life yet over the years we have turned a blind eye to the plight it is in. Global warming is not an abstract concept but a global phenomenon occurring ever so slowly even at this moment. Global Warming is a phenomenon that is occurring every minute resulting in a gradual increase in the Earth’s overall climate. Brought about by greenhouse gases that trap the solar radiation in the atmosphere, global warming can change the entire map of the earth, displacing areas, flooding many countries, and destroying multiple lifeforms. Extreme weather is a direct consequence of global warming but it is not an exhaustive consequence. There are virtually limitless effects of global warming which are all harmful to life on earth. The sea level is increasing by 0.12 inches per year worldwide. This is happening because of the melting of polar ice caps because of global warming. This has increased the frequency of floods in many lowland areas and has caused damage to coral reefs. The Arctic is one of the worst-hit areas affected by global warming. Air quality has been adversely affected and the acidity of the seawater has also increased causing severe damage to marine life forms. Severe natural disasters are brought about by global warming which has had dire effects on life and property. As long as mankind produces greenhouse gases, global warming will continue to accelerate. The consequences are felt at a much smaller scale which will increase to become drastic shortly. The power to save the day lies in the hands of humans, the need is to seize the day. Energy consumption should be reduced on an individual basis. Fuel-efficient cars and other electronics should be encouraged to reduce the wastage of energy sources. This will also improve air quality and reduce the concentration of greenhouse gases in the atmosphere. Global warming is an evil that can only be defeated when fought together. It is better late than never. If we all take steps today, we will have a much brighter future tomorrow. Global warming is the bane of our existence and various policies have come up worldwide to fight it but that is not enough. The actual difference is made when we work at an individual level to fight it. Understanding its import now is crucial before it becomes an irrevocable mistake. Exterminating global warming is of utmost importance and each one of us is as responsible for it as the next.  

Also Read: Essay on Library: 100, 200 and 250 Words

Essay on Global Warming UPSC

Always hear about global warming everywhere, but do we know what it is? The evil of the worst form, global warming is a phenomenon that can affect life more fatally. Global warming refers to the increase in the earth’s temperature as a result of various human activities. The planet is gradually getting hotter and threatening the existence of lifeforms on it. Despite being relentlessly studied and researched, global warming for the majority of the population remains an abstract concept of science. It is this concept that over the years has culminated in making global warming a stark reality and not a concept covered in books. Global warming is not caused by one sole reason that can be curbed. Multifarious factors cause global warming most of which are a part of an individual’s daily existence. Burning of fuels for cooking, in vehicles, and for other conventional uses, a large amount of greenhouse gases like carbon dioxide, and methane amongst many others is produced which accelerates global warming. Rampant deforestation also results in global warming as lesser green cover results in an increased presence of carbon dioxide in the atmosphere which is a greenhouse gas.  Finding a solution to global warming is of immediate importance. Global warming is a phenomenon that has to be fought unitedly. Planting more trees can be the first step that can be taken toward warding off the severe consequences of global warming. Increasing the green cover will result in regulating the carbon cycle. There should be a shift from using nonrenewable energy to renewable energy such as wind or solar energy which causes less pollution and thereby hinder the acceleration of global warming. Reducing energy needs at an individual level and not wasting energy in any form is the most important step to be taken against global warming. The warning bells are tolling to awaken us from the deep slumber of complacency we have slipped into. Humans can fight against nature and it is high time we acknowledged that. With all our scientific progress and technological inventions, fighting off the negative effects of global warming is implausible. We have to remember that we do not inherit the earth from our ancestors but borrow it from our future generations and the responsibility lies on our shoulders to bequeath them a healthy planet for life to exist. 

Also Read: Essay on Disaster Management

Climate Change and Global Warming Essay

Global Warming and Climate Change are two sides of the same coin. Both are interrelated with each other and are two issues of major concern worldwide. Greenhouse gases released such as carbon dioxide, CFCs, and other pollutants in the earth’s atmosphere cause Global Warming which leads to climate change. Black holes have started to form in the ozone layer that protects the earth from harmful ultraviolet rays. 

Human activities have created climate change and global warming. Industrial waste and fumes are the major contributors to global warming. 

Another factor affecting is the burning of fossil fuels, deforestation and also one of the reasons for climate change.  Global warming has resulted in shrinking mountain glaciers in Antarctica, Greenland, and the Arctic and causing climate change. Switching from the use of fossil fuels to energy sources like wind and solar. 

When buying any electronic appliance buy the best quality with energy savings stars. Don’t waste water and encourage rainwater harvesting in your community. 

Also Read: Essay on Air Pollution

Tips to Write an Essay

Writing an effective essay needs skills that few people possess and even fewer know how to implement. While writing an essay can be an assiduous task that can be unnerving at times, some key pointers can be inculcated to draft a successful essay. These involve focusing on the structure of the essay, planning it out well, and emphasizing crucial details.

Mentioned below are some pointers that can help you write better structure and more thoughtful essays that will get across to your readers:

• Prepare an outline for the essay to ensure continuity and relevance and no break in the structure of the essay
• Decide on a thesis statement that will form the basis of your essay. It will be the point of your essay and help readers understand your contention
• Follow the structure of an introduction, a detailed body followed by a conclusion so that the readers can comprehend the essay in a particular manner without any dissonance.
• Make your beginning catchy and include solutions in your conclusion to make the essay insightful and lucrative to read
• Reread before putting it out and add your flair to the essay to make it more personal and thereby unique and intriguing for readers  

Also Read: I Love My India Essay: 100 and 500+ Words in English for School Students

Ans. Both natural and man-made factors contribute to global warming. The natural one also contains methane gas, volcanic eruptions, and greenhouse gases. Deforestation, mining, livestock raising, burning fossil fuels, and other man-made causes are next.

Ans. The government and the general public can work together to stop global warming. Trees must be planted more often, and deforestation must be prohibited. Auto usage needs to be curbed, and recycling needs to be promoted.

Ans. Switching to renewable energy sources , adopting sustainable farming, transportation, and energy methods, and conserving water and other natural resources.

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Digvijay Singh

Having 2+ years of experience in educational content writing, withholding a Bachelor's in Physical Education and Sports Science and a strong interest in writing educational content for students enrolled in domestic and foreign study abroad programmes. I believe in offering a distinct viewpoint to the table, to help students deal with the complexities of both domestic and foreign educational systems. Through engaging storytelling and insightful analysis, I aim to inspire my readers to embark on their educational journeys, whether abroad or at home, and to make the most of every learning opportunity that comes their way.

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This was really a good essay on global warming… There has been used many unic words..and I really liked it!!!Seriously I had been looking for a essay about Global warming just like this…

Thank you for the comment!

I want to learn how to write essay writing so I joined this page.This page is very useful for everyone.

Hi, we are glad that we could help you to write essays. We have a beginner’s guide to write essays ( https://leverageedu.com/blog/essay-writing/ ) and we think this might help you.

It is not good , to have global warming in our earth .So we all have to afforestation program on all the world.

thank you so much

Very educative , helpful and it is really going to strength my English knowledge to structure my essay in future

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Global warming is the increase in 𝓽𝓱𝓮 ᴀᴠᴇʀᴀɢᴇ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇs ᴏғ ᴇᴀʀᴛʜ🌎 ᴀᴛᴍᴏsᴘʜᴇʀᴇ

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How To Talk To Children About Climate Change

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Climate change is an incredibly important topic for everyone who calls the Earth their home. This issue already has or will affect every child in the world. Whether you are a parent, caregiver, educator or counselor, you may feel apprehensive talking to children about climate change. Read on for some assistance on how to start the conversation, important topics to cover and how to keep climate change top of mind.

A mother and son work together on a Climate Action Club (CAC) planting project in Jordan. UNICEF-supported CACs help children gain knowledge on different environmental topics, becoming climate action advocates with their peers, families and wider community. Children also take part in initiatives to tackle environmental challenges in their communities.

Practical tips for parents, caregivers, educators

Climate change, or global warming, can be a complicated topic for adults to understand. So you may be wondering: How can I discuss it with the children in my life, and do I need to?

Climate change will affect every child in the world at some point in their lifetime. While you may think avoiding the subject protects them from worry or anxiety, it's likely already on their radar.

They're probably already hearing it mentioned at school, online and among friends. It could be part of a storyline in a favorite television show. They may be feeling mixed emotions, all of which are valid.

If children are confused, angry, sad or fearful, adults can provide some reassurance. Whether you are a parent, caregiver, educator or counselor, you can help children learn the facts, understand that they’re not alone and inspire ways to take action.

Micro waste picker Muna crosses Mitchells Plain in Cape Town, South Africa on her way to her local waste drop-off point. There she will trade recyclable materials for cash as part of The Recycling Champion Project, supported by UNICEF. The goal of the project is to increase recycling rates, reduce waste in landfills, lower greenhouse gas emissions and promote local economic growth.

Here are some tips to prepare for and conduct honest and meaningful conversations with children about climate change.

1. Do your research

Take some time to explore the many reliable online resources about climate change before starting a conversation.

Many reputable organizations, like National Geographic Kids , have done the homework for you already. Their child-friendly resources can assist you in brushing up on the science of climate change. NASA also has a great collection of information worth exploring with children.

If you’re an educator, the United States Environmental Protection Agency (EPA) offers resources to help plan classroom lessons.

Doing some research beforehand will help you start the conversation. A question you can't answer is an opportunity to learn together.

2. Break it down

Once you’ve done your own research on climate change and reviewed child-friendly resources, take some time to think about the children in your life. What do you think will resonate most?

A great place to start is by relating climate change to children's daily lives and breaking down the science into simple, age-appropriate language.

For example: you might discuss how fossil fuels are used in your home, school and modes of transportation; that the burning of those fuels leads to an increase of greenhouse gasses in the atmosphere; and that those gasses insulate the planet, in the same way that the walls of your home keep the warmth in, creating a hotter Earth. Rising temperatures can have many effects, ranging from increased floods and storms to melting polar ice caps and rising sea levels.

Visual aids like pictures and videos may help make this complicated subject more digestible. Climate Visuals offers a collection of images showcasing climate impacts and solutions. There are videos available on YouTube that break things down; just be sure the sources are credible. This NASA Climate Kids playlist is a great place to start.

In La Pistam Nebaj, Quiché, Guatemala, Juana Brito Corio, 38, tends her vegetable garden with daughter Cecilia, 14, and nephew Diego, 5. “You can tell something is off with climate," Juana says. "Every year, it’s getting and harder to grow our crops. It either rains too much or it’s too dry.” Virtually every child on the planet is already affected by climate change. Natural disasters, environmental degradation and biodiversity loss can devastate agriculture, cutting children off from nutritious foods and safe water.

3. Actively listen

Consider kicking off the conversation by asking children what they already know about climate change. Have they heard the subject mentioned before? Where did they hear about it and how did it make them feel?

Their answers may surprise you. Just be sure that when they are sharing their knowledge and emotions with you, you stay focused. Put your phone down, limit any distractions and provide your undivided attention. Actively listen by asking questions and mirroring their language so that they feel heard and understood.

Although you may instinctively want to assuage their fears about the future of the planet, be sure not to dismiss or minimize any worries they have.

4. Spend time outside

Exposing children to the wonders of nature is a great way to grow their appreciation for the planet.

Encourage kids to spend time outside doing things they love. You know them best; perhaps they’ll enjoy riding their bikes through the park, surveying trees and looking for birds or going on a camping trip. Spend time watching the clouds and talking about how weather changes can occur. Observe trees, plants and flowers and explain how the Earth and our atmosphere nurture living things.

Cultivating an understanding and love of the natural world around us will help children understand the importance of taking action to prevent and mitigate climate change.

5. Look for the helpers

“When I was a boy and I would see scary things in the news, my mother would say to me, ‘Look for the helpers. You will always find people who are helping.’” — Mister Rogers

With a topic as uncertain and overwhelming as climate change, children may start to feel a sense of dread or hopelessness. This is when you should be ready with examples of the helpers: people who are working tirelessly on ways to effectively address climate change.

UNICEF believes in backing young innovators to accelerate climate action . Young UNICEF climate activists are focused on leaving the planet better than they found it, leaning into optimism and determination to make it happen, and demanding action from governments .

These are just a few examples. See if you can find positive and inspiring stories about climate action close to home that you can share with the children in your life.

6. Inspire action

Learning and understanding are the first steps to taking action . Be sure to talk through the different levels of engagement, and ensure that children don’t feel like the enormous issue of climate change is falling squarely on their shoulders.

Start small by discussing what steps you can take, or are already taking, in your home or school to address climate change. Perhaps you can reduce waste in your home by saving water, recycling more effectively or unplugging unused lights and appliances. Could you add solar panels to your roof, carpool or ride a bike to work or school, or plant a few trees in your community?

Every action is important in the fight against climate change.

If the child or children you’re talking to are interested in taking a larger role in the climate movement, be open to their ideas and aspirations. Look through these tools for young climate activists with them, and help them create a plan to get started.

Eema Mariyam Shafeeq, 20, stands on an artificial beach in Malé, Maldives. "As a young person, I urge the people of the Maldives and the international society to not overlook climate change.”

While the subject of climate change may be challenging, it's important to keep it top of mind. Ongoing conversation is critical around an issue that is shaping the future of our planet and impacting every living thing — the world's children most of all.

Related: How to Talk to Children About Conflict and War

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Scientists expect global heating to exceed 1.5°C, and other nature and climate stories you need to read this week

Top nature and climate news: The ocean has broken temperature records every single day for a whole year and more Image:  Unsplash/William Bossen

.chakra .wef-1c7l3mo{-webkit-transition:all 0.15s ease-out;transition:all 0.15s ease-out;cursor:pointer;-webkit-text-decoration:none;text-decoration:none;outline:none;color:inherit;}.chakra .wef-1c7l3mo:hover,.chakra .wef-1c7l3mo[data-hover]{-webkit-text-decoration:underline;text-decoration:underline;}.chakra .wef-1c7l3mo:focus,.chakra .wef-1c7l3mo[data-focus]{box-shadow:0 0 0 3px rgba(168,203,251,0.5);} Meg Jones

• This weekly round-up contains key nature and climate news from the past week.
• Top nature and climate stories: Scientists foresee at least 2.5°C of global heating this century; Ocean temperatures continue to rise; Renewable energy produced more than 30% of the world’s electricity in 2023.

1. Planet is headed for at least 2.5°C of heating, finds poll of scientists

Many of the world’s leading climate scientists expect global temperatures to rise to at least 2.5°C above pre-industrial levels this century, according to a survey by The Guardian .

Almost 80% of respondents from the Intergovernmental Panel on Climate Change, foresee at least 2.5°C of global heating. Almost half are concerned that temperatures would rise to at least 3°C, with only 6% thinking the internationally agreed 1.5°C limit would be possible.

The survey found that opinions were dependent on age and gender, but not based on geographical location. Younger scientists were found to be more pessimistic. 52% of respondents under 50 expected a rise of at least 3°C, compared to just 38% of those over 50.

A similar difference was found between genders. 49% of female scientists believe that global temperature will rise to at least 3°C, compared with 38% of male scientists.

Peter Cox, at the University of Exeter, told The Guardian that: “Climate change will not suddenly become dangerous at 1.5°C – it already is. And it will not be ‘game over’ if we pass 2°C, which we might well do.”

The climate fight must continue, with many leading scientists urging that every fraction of a degree avoided would reduce the impact of the consequences for humanity and the planet.

The Global Risks Report 2023 ranked failure to mitigate climate change as one of the most severe threats in the next two years, while climate- and nature- related risks lead the rankings by severity over the long term.

The World Economic Forum’s Centre for Nature and Climate is a multistakeholder platform that seeks to safeguard our global commons and drive systems transformation. It is accelerating action on climate change towards a net-zero, nature-positive future.

Learn more about our impact:

• Scaling up green technologies: Through a partnership with the US Special Presidential Envoy for Climate, John Kerry, and over 65 global businesses, the First Movers Coalition has committed $12 billion in purchase commitments for green technologies to decarbonize the cement and concrete industry.
• 1 trillion trees: Over 90 global companies have committed to conserve, restore and grow more than 8 billion trees in 65 countries through the 1t.org initiative – which aims to achieve 1 trillion trees by 2030.
• Sustainable food production: Our Food Action Alliance is engaging 40 partners who are working on 29 flagship initiatives to provide healthy, nutritious, and safe foods in ways that safeguard our planet. In Vietnam, it supported the upskilling of 2.2 million farmers and aims to provide 20 million farmers with the skills to learn and adapt to new agricultural standards.
• Eliminating plastic pollution: Our Global Plastic Action Partnership is bringing together governments, businesses and civil society to shape a more sustainable world through the eradication of plastic pollution. In Ghana, more than 2,000 waste pickers are making an impact cleaning up beaches, drains and other sites.
• Protecting the ocean: Our 2030 Water Resources Group has facilitated almost $1 billion to finance water-related programmes , growing into a network of more than 1,000 partners and operating in 14 countries/states.
• Circular economy: Our SCALE 360 initiative is reducing the environmental impacts of value chains within the fashion, food, plastics and electronics industries, positively impacting over 100,000 people in 60 circular economy interventions globally.

Want to know more about our centre’s impact or get involved? Contact us .

2. The ocean has broken temperature records every single day for a whole year

Data from the EU's Copernicus Climate Service shows the ocean is at serious risk from a record-breaking year of heat , with some days experiencing huge margins of difference, the BBC reports.

Caused by intersecting factors, including planet-warming gases and El Niño, the increasing temperatures of our seas have had drastic consequences for marine life resulting in a new wave of coral bleaching.

Copernicus also confirmed that April was the warmest on record for global air temperatures, making it the 11th record-breaking month in a row.

The ocean absorbs around a quarter of the carbon dioxide that humans produce, as well as 90% of the excess heat produced. However, they are increasingly feeling the heat.

The average surface temperature of the ocean began to accelerate far above the long-term norm from March 2023, hitting a record high in August.

3. News in brief: Other top nature and climate stories this week

Biodiversity loss is the biggest environmental driver of infectious disease outbreaks , according to a new study published in Nature , The Guardian reports . Of the five global change drivers analyzed, loss of species was determined to put the world most at risk of widespread disease outbreaks – followed by climate change and the introduction of non-native species.

Venezuela is thought to be the first country to have lost all of its glaciers in modern times. Once home to six of them, the country has now lost its last remaining glacier - the Humboldt Glacier, also known as La Corona – after it shrunk so much that scientists have reclassified it as an ice field.

Following a rapid rise in wind and solar power, renewable energy accounted for more than 30% of the world’s electricity for the first time in 2023 , found climate thinktank Ember.

Poorer countries must be more transparent about their progress on cutting emissions and climate spending to support their calls for vast sums of climate finance, says the president of global climate negotiations.

After experiencing the worst drought in five decades, Costa Rica has announced an electricity rationing plan , as the severe lack of rainfall hampers the efficiency of its hydroelectric plants.

4. More on the nature and climate crisis on Agenda

The automotive industry is responsible for 10% of the world’s carbon dioxide emissions as the producer of 80 million vehicles annually. As environmental concerns mount, find out how the sector is navigating the sustainability drive.

Emerging technologies like Augmented and Virtual Reality can bolster climate action efforts, find out how they're offering new ways for us and our leaders to connect with the climate crisis and its solution s .

Climate change is predicted to cut average incomes by almost 20%, with more frequent and extreme weather events predicted to cause $38 trillion of destruction every year by the middle of the 21st century. Find out more .

Related topics:

NY must make the electric school bus transition

New York State has mandated that by 2035 all school buses in the state be zero-emission, like the electric buses above.

  Credit: Logan Bus Co. Inc.

This guest essay reflects the views of Bella Cockerell, New York organizing manager for Mothers Out Front, and Joseph Ambrosio, chief executive of Unique Electric Solutions Inc., a Holbrook-based company that repowers diesel buses into electric buses.

When New York’s all-electric school bus legislation passed in 2022, environmentalists lauded it as a visionary plan and a victory in the climate fight, while school administrators and parents cheered the health and safety benefits it would provide for the state's more than 2 million children who ride to and from school each day.

In the two years since that groundbreaking legislation passed, questions have been raised about the feasibility — both financially and operationally — of meeting the 2027 deadline for new purchases and the 2035 deadline for the entire fleet.

These concerns are misplaced, and the urgency remains to address the detrimental effects of diesel-powered buses on the environment and our children's health.

Air pollution inside a diesel bus can be as much as 12 times higher than outside the bus. That’s because when a school bus stops at a traffic signal, is stuck in traffic, or pauses to pick up or drop off students, the filthy tailpipe emissions drift back into the cabin for the children and driver to breathe in.

This is a major contributor to the surging asthma epidemic, which is especially prevalent in low-income communities and communities of color. For these children, that means difficulty breathing, regular visits to the emergency room, and missed classes. In fact, asthma affects 10% of children and is the leading cause of school absenteeism in New York, according to the state Department of Health. In the long term, it contributes to poorer learning outcomes, lower earning potential, and chronic health conditions.

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Alongside the public health benefits of electric school buses are unquestioned environmental benefits. With the transportation sector making up nearly 30% of statewide greenhouse emissions, transitioning our school bus fleet to electric is crucial to the climate fight.

Fortunately, substantial funding is available right now at the state and federal levels for electric school buses and charging stations, as well as for a pragmatic alternative to purchasing new buses — retrofitting existing gas buses to make them electric. Changing over an entire fleet to electric in one year is not always practical; retrofits can address cost concerns and provide more flexibility for a phased transition.

Funds from New York’s Environmental Bond Act and the state's School Bus Incentive Program are already easing the financial burden on school districts, as are the federal bipartisan Infrastructure Act and the Environmental Protection Agency's Clean School Bus Program. The state incentive program alone can provide up to $171,000 for each electric school bus purchased, which would pay for most of the cost of a repower or nearly 50% of a new electric bus. Enough resources exist for school districts to begin the transition immediately.

Even in rural upstate districts, where bus routes face longer commutes and colder temperatures, electric buses have the juice to make these journeys. In Havre, Montana, for example, a sparsely populated rural county, electric school buses have handled temperatures as low as minus-40 degrees.

With school budget votes taking place next week, the time is now for parents to tell their local school officials that they will not stand by while dirty diesel buses compromise their children’s health.

Starting small and learning as we go are key principles. School districts can begin with just a single bus, gaining valuable insights into the operational and logistical aspects.

As the saying goes, “Start small, but start now.”

This guest essay reflects the views of Bella Cockerell, New York organizing manager for Mothers Out Front, and Joseph Ambrosio, chief executive of Unique Electric Solutions Inc., a Holbrook-based company that repowers diesel buses into electric buses.

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The Picture Show

Photos: see the northern lights from rare solar storm.

Geoff Brumfiel

Christchurch, New Zealand: People look at the Aurora Australis, also known as the Southern Lights, in Rolleston on May 11, 2024. Sanka Vidanagama/AFP/Getty Images hide caption

The largest geomagnetic storm in nearly two decades is hitting Earth's atmosphere . It's producing a beautiful glow in the sky all over the world.

A sunspot has sent a stream of charged particles towards Earth.

As those particles hit the Earth's atmosphere they will be heated and start glowing producing beautiful aurora.

South looks north, as solar storm brings auroras

Lisa Upton is with the Southwest Research Institute. Social media is already filling with photos from places like Finland, Russia, Germany and New Zealand, which catches the same effect in the southern hemisphere. It's not clear how far down in the U.S. the aurora will spread, but Upton is keeping an eye out in Colorado.

Space weather forecasters expect the solar storm to peak overnight, but it will last throughout the weekend.

Brunswick, Maine: The northern lights flare in the sky over a farmhouse, late Friday, May 10, 2024. Robert F. Bukaty/AP hide caption

Brunswick, Maine: The northern lights flare in the sky over a farmhouse, late Friday, May 10, 2024.

Estacada, Ore.: In this image taken with a long exposure, cars pass by as people look at the night sky towards the northern lights, or Aurora Borealis, on Friday, May 10, 2024, in Estacada, Ore. Jenny Kane/AP hide caption

Lake Berryessa, Calif.: The blinking lights of a plane streak through the aurora borealis, also known as the northern lights, which is visible on May 11, 2024. Carlos Avila Gonzalez/San Francisco Chronicle/Getty Images hide caption

London, Ontario: People stop along a country road near London, Ontario to watch the Northern lights or aurora borealis during a geomagnetic storm on May 10, 2024. Geoff Robins/AFP/Getty Images hide caption

Brandenburg, Germany: Light green and slightly reddish auroras glow in the night sky. Patrick Pleul/dpa/picture alliance/Getty Images hide caption

Brandenburg, Germany: Light green and slightly reddish auroras glow in the night sky.

Whitley Bay, England: People visit St Mary's lighthouse in Whitley Bay to see the aurora borealis, commonly known as the northern lights. Ian Forsyth/Getty Images hide caption

Crosby Beach, Liverpool, England: The aurora borealis, also known as the northern lights, glow on the horizon at Another Place by Anthony Gormley. Peter Byrne/PA Images/Getty Images hide caption

Crosby Beach, Liverpool, England: The aurora borealis, also known as the northern lights, glow on the horizon at Another Place by Anthony Gormley.

Saxony-Anhalt, Schierke, Germany: Northern lights can be seen from the Brocken. The natural spectacle is particularly intense on Saturday night. Matthias Bein/dpa/picture alliance/Getty Images hide caption

Rochester, N.Y: Northern Lights light up the sky on May 11, 2024. Lokman Vural Elibol/Anadolu/Getty Images hide caption

Hesse, Germany: Northern lights appear in the night sky over the Pferdskopf near Treisberg in the Hochtaunus district of Hesse. Lando Hass/dpa/picture alliance/Getty Images hide caption

Mount Mitchell, N.C.: Unusual sun activity created a G5 Geostorm on Earth sparks northern lights on May 10, 2024. Peter Zay/Anadolu/Getty Images hide caption

London, Ontario: Northern lights or aurora borealis illuminate the night sky near London, Ontario, during a geomagnetic storm on May 10, 2024. Geoff Robins/AFP/Getty Images hide caption

Debrad, Slovakia: Northern lights illuminate the sky May 11, 2024. Robert Nemeti/Anadolu/Getty Images hide caption

Eindhoven, Ukraine: Northern lights illuminate the sky in Eindhoven, Ukraine, May 10, 2024. Nikos Oikonomou/Anadolu/Getty Images hide caption

Liseleje, Denmark: Northern lights illuminate the sky in Liseleje, Denmark on May 11, 2024. Mohamed El-Shemy/Anadolu/Getty Images hide caption

Markville, Minnesota: The northern lights glow in the sky over St. Croix State Forest late Friday, May 10, 2024. Mark Vancleave/AP hide caption

Donetsk Oblast, Ukraine: Northern lights light up the sky May 11, 2024. Diego Herrera Carcedo/Anadolu/Getty Images hide caption

Skidmore, Missouri: Old tombstones stand against the northern lights at a cemetery early Saturday, May 11, 2024. Charlie Riedel/AP hide caption

Middletown, California: Northern lights illuminate the night sky over a camper's tent north of San Francisco on May 11, 2024. Josh Edelson/AFP/Getty Images hide caption

Middletown, California: Northern lights illuminate the night sky over a camper's tent north of San Francisco on May 11, 2024.

Estacada, Oregon: In this image taken with a long exposure, people look at the night sky towards the northern lights, or Aurora Borealis, on Friday, May 10, 2024. Jenny Kane/AP hide caption

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• International

The latest on the massive solar storm

By Angela Fritz, Elise Hammond and Chris Lau, CNN

Incredible lighthouse picture from Maine

From CNN's Chris Lau

Among a flurry of surreal images capturing the dazzling auroras is one taken by Benjamin Williamson of a lighthouse in Portland, Maine.

"It's one of the most incredible things I've ever seen, the awe and wonder," Williamson told CNN.

He said he used a long-exposure technique to snap the shot, but did not edit it.

Watch the full interview with Williamson here .

Things could be about to ramp up

If you still haven't seen the aurora, hold on for another 30 minutes to an hour, according to CNN meteorologist Chad Myers.

The next wave of coronal mass ejections, or CMEs, which cause the aurora, is about to arrive, he said.

"Just wait a minute because things are going to start to ramp up here," he said, adding that the increase could arrive "anytime now." "When it comes, get outside, get ready, put your coat on."

For those who are too busy to witness the phenomenon tonight, Myers said the aurora is expected to last three nights.

Why does the aurora last for a weekend?

By CNN's Chris Lau

Generally, it takes just eight minutes for light to travel 93 million miles to the Earth from the sun, but astrophysicist Janna Levin said the energized particles causing the current wave of aurora travel a lot slower, causing the phenomenon to last for the weekend.

"Some of these mass ejections are trillions of kilograms," she said. "They're slower. So they're taking longer, but still hours, maybe tens of hours."

Here's how the solar storm looks in the South and on the East Coast

The aurora was visible across the East Coast and in the South Friday.

Here's how it looked in Chester, South Carolina.

Down in Florida, waves of color swam through the sky.

Up north in New Jersey, a purple-ish haze could be seen in the sky.

Will solar storms get more intense and risky in the future?

The answer is probably not in the short term, according to astrophysicist Hakeem Oluseyi.

He said scientists study what is constantly happening on the surface of the sun and have found a pattern.

“Geological data shows us that in the past the sun was way more active than it is today. It has cycles where it goes very quiet ... and you have events that show that the solar activity was much, much greater,” he told CNN. “So there's no evidence that we're going to see those big maxima this cycle." 

But the astrophysicist also spoke of a caveat - the limitations of modern science.

“Even though it's predictable in the short term, we still don't quite understand what creates the magnetic fields in the sun,” he said, adding: “That's why NASA has so many satellites looking at the sun.”

In Pictures: Auroras light the sky during rare solar storm

From CNN Digital's Photo Team

A series of solar flares and coronal mass ejections from the sun are creating dazzling auroras across the globe .

The rare solar storm may also disrupt communications. The last time a solar storm of this magnitude reached Earth was in October 2003, according to the National Oceanic and Atmospheric Administration's Space Weather Prediction Center.

See more photos of the aurora from tonight.

Behind dazzling aurora could lie “real danger,” Bill Nye the Science Guy says

The massive solar storm could present “a real danger,” especially with the modern world relying so much on electricity, according to Bill Nye the Science Guy , a science educator and engineer.

Scientists are warning an increase in solar flares and coronal mass ejections from the sun have the potential to disrupt communication on Earth into the weekend. Solar flares can affect communications and GPS almost immediately because they disrupt Earth’s ionosphere, or part of the upper atmosphere. Energetic particles released by the sun can also disrupt electronics on spacecraft and affect astronauts without proper protection within 20 minutes to several hours.

In comparison to tonight's event, Nye drew comparisons with another incident in 1859, known as the Carrington Event, when telegraph communications were severely affected.

“The other thing, everybody, that is a real danger to our technological society, different from 1859, is how much we depend on electricity and our electronics and so on,” Nye said. "None of us really in the developed world could go very long without electricity."

He noted that there are systems in place to minimize the impact, but “stuff might go wrong,” stressing that not all transformers are equipped to withstand such a solar event.

“It depends on the strength of the event and it depends on how much of our infrastructures are prepared for this the sort of thing,” he said.

Bill Nye breaks down significance of the solar storm | CNN

This post has been updated with more details on solar flares' impact on electronics.

Here's where clouds will block the view of the northern lights in the US

From CNN's Angela Fritz

After an incredibly stormy week, most of the Lower 48 has clear skies to see the northern lights. But there are some areas where clouds and rainy weather are spoiling the view.

A deck of clouds is blocking the sky in the Northeast, from parts of Virginia into Maine, as an area of low pressure spins off the East Coast.

In the Midwest, the aurora will be hard to see through thick clouds in parts of Wisconsin, Michigan — including the Upper Peninsula — and Illinois.

A stripe of clouds is tracking across Texas, including Dallas-Forth Worth, and into Louisiana.

And in the Southwest, patchy clouds across the the Four Corners region could make the northern lights difficult to spot.

Aurora seen at least as far south as Georgia

Barely visible to the naked eye, the aurora can be seen in Atlanta in the 10 p.m. ET hour. 

It is easier to see through photographs using a long exposure. The photos below, taken by CNN's Eric Zerkel and Emily Smith, used 3- and 10-second exposures.

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May 10, 2024

Governor Newsom Unveils Revised State Budget, Prioritizing Balanced Solutions for a Leaner, More Efficient Government

Para leer este comunicado en español, haga clic aquí .

The Budget Proposal — Covering Two Years — Cuts Spending, Makes Government Leaner, and Preserves Core Services Without New Taxes on Hardworking Californians

Watch Governor Newsom’s May Revise presentation here

WHAT YOU NEED TO KNOW: The Governor’s revised budget proposal closes both this year’s remaining $27.6 billion budget shortfall and next year’s projected $28.4 billion deficit while preserving many key services that Californians rely on — including education, housing, health care, and food assistance.

SACRAMENTO – Governor Gavin Newsom today released a May Revision proposal for the 2024-25 fiscal year that ensures the budget is balanced over the next two fiscal years by tightening the state’s belt and stabilizing spending following the tumultuous COVID-19 pandemic, all while preserving key ongoing investments.

Under the Governor’s proposal, the state is projected to achieve a positive operating reserve balance not only in this budget year but also in the next. This “budget year, plus one” proposal is designed to bring longer-term stability to state finances without delay and create an operating surplus in the 2025-26 budget year.

In the years leading up to this May Revision, the Newsom Administration recognized the threats of an uncertain stock market and federal tax deadline delays – setting aside $38 billion in reserves that could be utilized for shortfalls. That has put California in a strong position to maintain fiscal stability.

Even when revenues were booming, we were preparing for possible downturns by investing in reserves and paying down debts – that’s put us in a position to close budget gaps while protecting core services that Californians depend on. Without raising taxes on Californians, we’re delivering a balanced budget over two years that continues the progress we’ve fought so hard to achieve, from getting folks off the streets to addressing the climate crisis to keeping our communities safe.

Governor Gavin Newsom

Below are the key takeaways from Governor Newsom’s proposed budget:

A BALANCED BUDGET OVER TWO YEARS. The Governor is solving two years of budget problems in a single budget, tightening the state’s belt to get the budget back to normal after the tumultuous years of the COVID-19 pandemic. By addressing the shortfall for this budget year — and next year — the Governor is eliminating the 2024-25 deficit and eliminating a projected deficit for the 2025-26 budget year that is $27.6 billion (after taking an early budget action) and $28.4 billion respectively.

CUTTING SPENDING, MAKING GOVERNMENT LEANER. Governor Newsom’s revised balanced state budget cuts one-time spending by $19.1 billion and ongoing spending by $13.7 billion through 2025-26. This includes a nearly 8% cut to state operations and a targeted elimination of 10,000 unfilled state positions, improving government efficiency and reducing non-essential spending — without raising taxes on individuals or proposing state worker furloughs. The budget makes California government more efficient, leaner, and modern — saving costs by streamlining procurement, cutting bureaucratic red tape, and reducing redundancies.

PRESERVING CORE SERVICES & SAFETY NETS. The budget maintains service levels for key housing, food, health care, and other assistance programs that Californians rely on while addressing the deficit by pausing the expansion of certain programs and decreasing numerous recent one-time and ongoing investments.

NO NEW TAXES & MORE RAINY DAY SAVINGS. Governor Newsom is balancing the budget by getting state spending under control — cutting costs, not proposing new taxes on hardworking Californians and small businesses — and reducing the reliance on the state’s “Rainy Day” reserves this year.

HOW WE GOT HERE: California’s budget shortfall is rooted in two separate but related developments over the past two years.

• First, the state’s revenue, heavily reliant on personal income taxes including capital gains, surged in 2021 due to a robust stock market but plummeted in 2022 following a market downturn. While the market bounced back by late 2023, the state continued to collect less tax revenue than projected in part due to something called “capital loss carryover,” which allows losses from previous years to reduce how much an individual is taxed.
• Second, the IRS extended the tax filing deadline for most California taxpayers in 2023 following severe winter storms, delaying the revelation of reduced tax receipts. When these receipts were able to eventually be processed, they were 22% below expectations. Without the filing delay, the revenue drop would have been incorporated into last year’s budget and the shortfall this year would be significantly smaller.

CALIFORNIA’S ECONOMY REMAINS STRONG: The Governor’s revised balanced budget sets the state up for continued economic success. California’s economy remains the 5th largest economy in the world and for the first time in years, the state’s population is increasing and tourism spending recently experienced a record high. California is #1 in the nation for new business starts , #1 for access to venture capital funding , and the #1 state for manufacturing , high-tech , and agriculture .

Additional details on the May Revise proposal can be found in this fact sheet and at www.ebudget.ca.gov .

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